FabricCore

The main class that works the core API is Fabric. In this module we define FabricCore, which contains most of the functionality of Fabric.

It does not contain the volume support. Volume support requires tf.volumes.extract and tf.volumes.collect which need to load and save TF datasets, and loading and saving are Fabric functionalities.

Hence a Fabric with volume support would lead to circular imports. By leaving out volume support, volume support can use FabricCore instead of Fabric.

Global variables

var PRECOMPUTE

Pre-computation steps.

Each step corresponds to a pre-computation task.

A task is specified by a tuple containing:

Parameters

dep : boolean

Whether the step is dependent on the presence of additional features. Only relevant for the pre-computation of section structure: that should only happen if there are section features.

name : string

The name of the result of a pre-computed task. The result is a blob of data that can be loaded and compressed just as ordinary features.

function : function

The function that performs the pre-computation task. These functions are defined in tf.core.prepare.

dependencies : strings

The remaining parts of the tuple are the names of pre-computed features that must be coomputed before and whose results are passed as argument to the function that executes the pre-computation.

For a description of what the steps are for, see the functions in tf.core.prepare.

Classes

class FabricCore (locations=None, modules=None, silent='auto')

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class FabricCore:
    """Initialize the core API for a corpus.

    Top level management of

    *   locating TF feature files
    *   loading and saving feature data
    *   pre-computing auxiliary data
    *   caching pre-computed and compressed data

    TF is initialized for a corpus.
    It will search a set of directories and catalogue all `.tf` files it finds there.
    These are the features you can subsequently load.

    Here `directories` and `subdirectories` are strings with directory names
    separated by newlines, or iterables of directories.

    Parameters
    ----------
    locations: string | iterable of strings, optional
        The directories specified here are used as base locations
        in searching for TF feature files.
        In general, they will not searched directly, but certain subdirectories
        of them will be searched, specified by the `modules` parameter.

        Defaults:

            ~/Downloads/text-fabric-data
            ~/text-fabric-data
            ~/github/text-fabric-data

        So if you have stored your main TF dataset in
        `text-fabric-data` in one of these directories
        you do not have to pass a location to Fabric.

    modules: string | iterable of strings
        The directories specified in here are used as sub directories
        appended to the directories given by the `locations` parameter.

        All `.tf` files (non-recursively) in any `location/module`
        will be added to the feature set to be loaded in this session.
        The order in `modules` is important, because if a feature occurs in
        multiple modules, the last one will be chosen.
        In this way you can easily override certain features in one module
        by features in an other module of your choice.

        Default: `['']`

        So if you leave it out, TF will just search the paths specified
        in `locations`.

    silent: string, optional tf.core.timestamp.SILENT_D
        See `tf.core.timestamp.Timestamp`

    _withGc: boolean, optional True
        If False, it disables the Python garbage collector before
        loading features. Used to experiment with performance.


    !!! note "`otext@` in modules"
        If modules contain features with a name starting with `otext@`, then the format
        definitions in these features will be added to the format definitions in the
        regular `otext` feature (which is a `tf.parameters.WARP` feature).
        In this way, modules that define new features for text representation,
        also can add new formats to the Text-API.

    Returns
    -------
    object
        An object from which you can call up all the of methods of the core API.
    """

    def __init__(self, locations=None, modules=None, silent=SILENT_D, _withGc=True):
        silent = silentConvert(silent)
        self._withGc = _withGc
        self.silent = silent
        tmObj = Timestamp(silent=silent)
        self.tmObj = tmObj
        setSilent = tmObj.setSilent
        setSilent(silent)
        self.banner = BANNER
        """The banner Text-Fabric.

        Will be shown just after start up, if the silence is not `deep`.
        """

        self.version = VERSION
        """The version number of the TF library.
        """

        (on32, warn, msg) = check32()
        warning = tmObj.warning
        info = tmObj.info
        debug = tmObj.debug

        if on32:
            warning(warn, tm=False)
        if msg:
            info(msg, tm=False)
        debug(self.banner, tm=False)
        self.good = True

        if modules is None:
            modules = [""]
        elif type(modules) is str:
            modules = [normpath(x.strip()) for x in itemize(modules, "\n")]
        else:
            modules = [normpath(str(x)) for x in modules]
        self.modules = modules

        if locations is None:
            locations = LOCATIONS
        elif type(locations) is str:
            locations = [normpath(x.strip()) for x in itemize(locations, "\n")]
        else:
            locations = [normpath(str(x)) for x in locations]
        setDir(self)
        self.locations = []
        for loc in locations:
            self.locations.append(expandDir(self, loc))

        self.locationRep = "\n\t".join(
            "\n\t".join(f"{lc}/{f}" for f in self.modules) for lc in self.locations
        )
        self.featuresRequested = []
        self.features = {}
        """Dictionary of all features that TF has found, whether loaded or not.

        Under each feature name is all info about that feature.

        The best use of this is to get the metadata of features:

            TF.features['fff'].metaData

        This works for all features `fff` that have been found,
        whether the feature is loaded or not.

        If a feature is loaded, you can also use

        `F.fff.meta` of `E.fff.meta` depending on whether `fff` is a node feature
        or an edge feature.

        !!! caution "Do not print!"
            If a feature is loaded, its data is also in the feature info.
            This can be an enormous amount of information, and you can easily
            overwhelm your notebook if you print it.
        """

        self._makeIndex()

    def load(self, features, add=False, silent=SILENT_D):
        """Loads features from disk into RAM memory.

        Parameters
        ----------

        features: string | iterable
            Either a string containing space separated feature names, or an
            iterable of feature names.
            The feature names are just the names of `.tf` files
            without directory information and without extension.
        add: boolean, optional False
            The features will be added to the same currently loaded features, managed
            by the current API.
            Meant to be able to dynamically load features without reloading lots
            of features for nothing.
        silent: string, optional tf.core.timestamp.SILENT_D
            See `tf.core.timestamp.Timestamp`

        Returns
        -------
        boolean | object
            If `add` is `True` a boolean indicating success is returned.
            Otherwise, the result is a new `tf.core.api.Api`
            if the feature could be loaded, else `False`.
        """

        silent = silentConvert(silent)
        tmObj = self.tmObj
        isSilent = tmObj.isSilent
        setSilent = tmObj.setSilent
        indent = tmObj.indent
        debug = tmObj.debug
        warning = tmObj.warning
        error = tmObj.error
        cache = tmObj.cache
        reset = tmObj.reset
        featuresOnly = self.featuresOnly

        wasSilent = isSilent()
        setSilent(silent)
        indent(level=0, reset=True)
        self.sectionsOK = True
        self.structureOK = True
        self.good = True

        if self.good:
            featuresRequested = sorted(fitemize(features))
            if add:
                self.featuresRequested += featuresRequested
            else:
                self.featuresRequested = featuresRequested
            for fName in (OTYPE, OSLOTS, OTEXT):
                self._loadFeature(fName, optional=fName == OTEXT or featuresOnly)

        self.textFeatures = set()

        if self.good and not featuresOnly:
            if OTEXT in self.features:
                otextMeta = self.features[OTEXT].metaData
                for otextMod in self.features:
                    if otextMod.startswith(OTEXT + "@"):
                        self._loadFeature(otextMod)
                        otextMeta.update(self.features[otextMod].metaData)
                self.sectionFeats = itemize(otextMeta.get("sectionFeatures", ""), ",")
                self.sectionTypes = itemize(otextMeta.get("sectionTypes", ""), ",")
                self.structureFeats = itemize(
                    otextMeta.get("structureFeatures", ""), ","
                )
                self.structureTypes = itemize(otextMeta.get("structureTypes", ""), ",")
                (self.cformats, self.formatFeats) = collectFormats(otextMeta)

                if not (0 < len(self.sectionTypes) <= 3) or not (
                    0 < len(self.sectionFeats) <= 3
                ):
                    if not add:
                        warning(
                            f"Dataset without sections in {OTEXT}:"
                            f"no section functions in the T-API"
                        )
                    self.sectionsOK = False
                else:
                    self.textFeatures |= set(self.sectionFeats)
                    self.sectionFeatsWithLanguage = tuple(
                        f
                        for f in self.features
                        if f == self.sectionFeats[0]
                        or f.startswith(f"{self.sectionFeats[0]}@")
                    )
                    self.textFeatures |= set(self.sectionFeatsWithLanguage)
                if not self.structureTypes or not self.structureFeats:
                    if not add:
                        debug(
                            f"Dataset without structure sections in {OTEXT}:"
                            f"no structure functions in the T-API"
                        )
                    self.structureOK = False
                else:
                    self.textFeatures |= set(self.structureFeats)

                formatFeats = set(self.formatFeats)
                self.textFeatures |= formatFeats

                for fName in self.textFeatures:
                    self._loadFeature(fName, optional=fName in formatFeats)

                dep1Feats = self.dep1Feats
                if dep1Feats:
                    cformats = self.cformats
                    tFormats = {}
                    tFeats = set()
                    for (fmt, (otpl, tpl, featData)) in cformats.items():
                        feats = set(chain.from_iterable(x[0] for x in featData))
                        tFormats[fmt] = tuple(sorted(feats))
                        tFeats |= feats
                    tFeats = tuple(sorted(tFeats))
                    extraDependencies = [tFormats]
                    for tFeat in tFeats:
                        featData = self.features[tFeat].data
                        extraDependencies.append((tFeat, featData))
                    for cFeat in dep1Feats:
                        self.features[cFeat].dependencies += extraDependencies

            else:
                self.sectionsOK = False
                self.structureOK = False

        if self.good and not featuresOnly:
            self._precompute()

        if self.good:
            reset()
            for fName in self.featuresRequested:
                self._loadFeature(fName)
                if not self.good:
                    indent(level=0)
                    cache()
                    error("Not all features could be loaded / computed")
                    result = False
                    break
                reset()

        if self.good:
            if add:
                try:
                    self._updateApi()
                    result = True
                except MemoryError:
                    console(MEM_MSG)
                    result = False
            else:
                try:
                    result = self._makeApi()
                except MemoryError:
                    console(MEM_MSG)
                    result = False
        else:
            result = False

        setSilent(wasSilent)
        return result

    def explore(self, silent=SILENT_D, show=True):
        """Makes categorization of all features in the dataset.

        Parameters
        ----------
        silent: string, optional tf.core.timestamp.SILENT_D
            See `tf.core.timestamp.Timestamp`
        show: boolean, optional True
            If `False`, the resulting dictionary is delivered in `TF.featureSets`;
            if `True`, the dictionary is returned as function result.

        Returns
        -------
        dict | None
            A dictionary  with keys `nodes`, `edges`, `configs`, `computeds`.
            Under each key there is the set of feature names in that category.
            How this dictionary is delivered, depends on the parameter *show*.

        Notes
        -----
        !!! explanation "`configs`"
            These are configuration features, with metadata only, no data. E.g. `otext`.

        !!! explanation "`computeds`"
            These are blocks of pre-computed data, available under the `C` API,
            see `tf.core.computed.Computeds`.

        The sets do not indicate whether a feature is loaded or not.
        There are other functions that give you the loaded features:
        `tf.core.api.Api.Fall` for nodes and `tf.core.api.Api.Eall` for edges.
        """

        silent = silentConvert(silent)
        tmObj = self.tmObj
        isSilent = tmObj.isSilent
        setSilent = tmObj.setSilent
        info = tmObj.info

        wasSilent = isSilent()
        setSilent(silent)
        nodes = set()
        edges = set()
        configs = set()
        computeds = set()

        for (fName, fObj) in self.features.items():
            fObj.load(silent=silent, metaOnly=True)
            dest = None
            if fObj.method:
                dest = computeds
            elif fObj.isConfig:
                dest = configs
            elif fObj.isEdge:
                dest = edges
            else:
                dest = nodes
            dest.add(fName)
        info(
            "Feature overview: {} for nodes; {} for edges; {} configs; {} computed".format(
                len(nodes),
                len(edges),
                len(configs),
                len(computeds),
            )
        )
        self.featureSets = dict(
            nodes=nodes, edges=edges, configs=configs, computeds=computeds
        )
        setSilent(wasSilent)
        if show:
            return dict(
                (kind, tuple(sorted(kindSet)))
                for (kind, kindSet) in sorted(
                    self.featureSets.items(), key=lambda x: x[0]
                )
            )

    def loadAll(self, silent=SILENT_D):
        """Load all loadable features.

        Parameters
        ----------
        silent: string, optional tf.core.timestamp.SILENT_D
            See `tf.core.timestamp.Timestamp`
        """

        silent = silentConvert(silent)
        api = self.load("", silent=silent)
        allFeatures = self.explore(silent=silent, show=True)
        loadableFeatures = allFeatures["nodes"] + allFeatures["edges"]
        self.load(loadableFeatures, add=True, silent=silent)
        return api

    def clearCache(self):
        """Clears the cache of compiled TF data.

        TF pre-computes data for you, so that it can be loaded faster.
        If the original data is updated, TF detects it,
        and will recompute that data.

        But there are cases, when the algorithms of TF have changed,
        without any changes in the data, where you might want to clear the cache
        of pre-computed results.

        Calling this function just does it, and it is equivalent with manually removing
        all `.tfx` files inside the hidden `.tf` directory inside your dataset.

        !!! hint "No need to load"
            It is not needed to execute a `TF.load()` first.

        See Also
        --------
        tf.clean
        """

        for (fName, fObj) in self.features.items():
            fObj.cleanDataBin()

    def save(
        self,
        nodeFeatures: nodeFeatureDict = {},
        edgeFeatures: edgeFeatureDict = {},
        metaData: metaDataDict = {},
        location=None,
        module=None,
        silent=SILENT_D,
    ):
        """Saves newly generated data to disk as TF features, nodes and / or edges.

        If you have collected feature data in dictionaries, keyed by the
        names of the features, and valued by their feature data,
        then you can save that data to `.tf` feature files on disk.

        It is this easy to export new data as features:
        collect the data and metadata of the features and feed it in an orderly way
        to `TF.save()` and there you go.

        Parameters
        ----------
        nodeFeatures: dict of dict
            The data of a node feature is a dictionary with nodes as keys (integers!)
            and strings or numbers as (feature) values.
            This parameter holds all those dictionaries, keyed by feature name.

        edgeFeatures: dict of dict
            The data of an edge feature is a dictionary with nodes as keys, and sets or
            dictionaries as values. These sets should be sets of nodes (integers!),
            and these dictionaries should have nodes as keys and strings or numbers
            as values.
            This parameter holds all those dictionaries, keyed by feature name.

        metaData: dict of  dict
            The meta data for every feature to be saved is a key-value dictionary.
            This parameter holds all those dictionaries, keyed by feature name.

            !!! explanation "value types"
                The type of the feature values (`int` or `str`) should be specified
                under key `valueType`.

            !!! explanation "edge values"
                If you save an edge feature, and there are values in that edge feature,
                you have to say so, by specifying `edgeValues=True`
                in the metadata for that feature.

            !!! explanation "generic metadata"
                This parameter may also contain fields under the empty name.
                These fields will be added to all features in `nodeFeatures` and
                `edgeFeatures`.

            !!! explanation "configuration features"
                If you need to write the *configuration* feature `otext`,
                which is a metadata-only feature, just
                add the metadata under key `otext` in this parameter and make sure
                that `otext` is not a key in `nodeFeatures` nor in
                `edgeFeatures`.
                These fields will be written into the separate configuration
                feature `otext`, with no data associated.

        location: dict
            The (meta)data will be written to the very last directory that TF searched
            when looking for features (this is determined by the
            `locations` and `modules` parameters in `tf.fabric.Fabric`.

            If both `locations` and `modules` are empty, writing will take place
            in the current directory.

            But you can override it:

            If you pass `location=something`, TF will save in `something/mod`,
            where `mod` is the last member of the `modules` parameter of TF.

        module: dict
            This is an additional way of overriding the default location
            where TF saves new features. See the *location* parameter.

            If you pass `module=something`, TF will save in `loc/something`,
            where `loc` is the last member of the `locations` parameter of TF.

            If you pass `location=path1` and `module=path2`,
            TF will save in `path1/path2`.

        silent: string, optional tf.core.timestamp.SILENT_D
            See `tf.core.timestamp.Timestamp`
        """

        silent = silentConvert(silent)
        tmObj = self.tmObj
        isSilent = tmObj.isSilent
        setSilent = tmObj.setSilent
        indent = tmObj.indent
        info = tmObj.info
        error = tmObj.error

        good = True
        wasSilent = isSilent()
        setSilent(silent)
        indent(level=0, reset=True)
        self._getWriteLoc(location=location, module=module)
        configFeatures = dict(
            f
            for f in metaData.items()
            if f[0] != "" and f[0] not in nodeFeatures and f[0] not in edgeFeatures
        )
        info(
            "Exporting {} node and {} edge and {} configuration features to {}:".format(
                len(nodeFeatures),
                len(edgeFeatures),
                len(configFeatures),
                self.writeDir,
            )
        )
        todo = []
        for fName in sorted(nodeFeatures):
            todo.append((fName, nodeFeatures[fName], False, False))
        for fName in sorted(edgeFeatures):
            todo.append((fName, edgeFeatures[fName], True, False))
        for fName in sorted(configFeatures):
            todo.append((fName, configFeatures[fName], None, True))
        total = collections.Counter()
        failed = collections.Counter()
        maxSlot = None
        maxNode = None
        slotType = None
        if OTYPE in nodeFeatures:
            info(f"VALIDATING {OSLOTS} feature")
            otypeData = nodeFeatures[OTYPE]
            if type(otypeData) is tuple:
                (otypeData, slotType, maxSlot, maxNode) = otypeData
            elif 1 in otypeData:
                slotType = otypeData[1]
                maxSlot = max(n for n in otypeData if otypeData[n] == slotType)
                maxNode = max(otypeData)
        if OSLOTS in edgeFeatures:
            info(f"VALIDATING {OSLOTS} feature")
            oslotsData = edgeFeatures[OSLOTS]
            if type(oslotsData) is tuple:
                (oslotsData, maxSlot, maxNode) = oslotsData
            if maxSlot is None or maxNode is None:
                error(f"ERROR: cannot check validity of {OSLOTS} feature")
                good = False
            else:
                info(f"maxSlot={maxSlot:>11}")
                info(f"maxNode={maxNode:>11}")
                maxNodeInData = max(oslotsData)
                minNodeInData = min(oslotsData)

                mappedSlotNodes = []
                unmappedNodes = []
                fakeNodes = []

                start = min((maxSlot + 1, minNodeInData))
                end = max((maxNode, maxNodeInData))
                for n in range(start, end + 1):
                    if n in oslotsData:
                        if n <= maxSlot:
                            mappedSlotNodes.append(n)
                        elif n > maxNode:
                            fakeNodes.append(n)
                    else:
                        if maxSlot < n <= maxNode:
                            unmappedNodes.append(n)

                if mappedSlotNodes:
                    error(f"ERROR: {OSLOTS} maps slot nodes")
                    error(makeExamples(mappedSlotNodes), tm=False)
                    good = False
                if fakeNodes:
                    error(f"ERROR: {OSLOTS} maps nodes that are not in {OTYPE}")
                    error(makeExamples(fakeNodes), tm=False)
                    good = False
                if unmappedNodes:
                    error(f"ERROR: {OSLOTS} fails to map nodes:")
                    unmappedByType = {}
                    for n in unmappedNodes:
                        unmappedByType.setdefault(
                            otypeData.get(n, "_UNKNOWN_"), []
                        ).append(n)
                    for (nType, nodes) in sorted(
                        unmappedByType.items(),
                        key=lambda x: (-len(x[1]), x[0]),
                    ):
                        error(f"--- unmapped {nType:<10} : {makeExamples(nodes)}")
                    good = False

            if good:
                info(f"OK: {OSLOTS} is valid")

        for (fName, data, isEdge, isConfig) in todo:
            edgeValues = False
            fMeta = {}
            fMeta.update(metaData.get("", {}))
            fMeta.update(metaData.get(fName, {}))
            if fMeta.get("edgeValues", False):
                edgeValues = True
            if "edgeValues" in fMeta:
                del fMeta["edgeValues"]
            fObj = Data(
                f"{self.writeDir}/{fName}.tf",
                self.tmObj,
                data=data,
                metaData=fMeta,
                isEdge=isEdge,
                isConfig=isConfig,
                edgeValues=edgeValues,
            )
            tag = "config" if isConfig else "edge" if isEdge else "node"
            if fObj.save(nodeRanges=fName == OTYPE, overwrite=True, silent=silent):
                total[tag] += 1
            else:
                failed[tag] += 1
        indent(level=0)
        info(
            f"""Exported {total["node"]} node features"""
            f""" and {total["edge"]} edge features"""
            f""" and {total["config"]} config features"""
            f""" to {self.writeDir}"""
        )
        if len(failed):
            for (tag, nf) in sorted(failed.items()):
                error(f"Failed to export {nf} {tag} features")
            good = False

        setSilent(wasSilent)
        return good

    def _loadFeature(self, fName, optional=False):
        if not self.good:
            return False

        tmObj = self.tmObj
        isSilent = tmObj.isSilent
        error = tmObj.error

        silent = isSilent()
        if fName not in self.features:
            if not optional:
                error(f'Feature "{fName}" not available in\n{self.locationRep}')
                self.good = False
        else:
            if not self.features[fName].load(silent=silent, _withGc=self._withGc):
                self.good = False

    def _makeIndex(self):
        tmObj = self.tmObj
        info = tmObj.info
        debug = tmObj.debug
        warning = tmObj.warning

        self.features = {}
        self.featuresIgnored = {}
        tfFiles = {}
        for loc in self.locations:
            for mod in self.modules:
                dirF = normpath(f"{loc}/{mod}")
                if not dirExists(dirF):
                    continue
                with scanDir(dirF) as sd:
                    files = tuple(
                        e.name for e in sd if e.is_file() and e.name.endswith(".tf")
                    )
                for fileF in files:
                    (fName, ext) = splitExt(fileF)
                    tfFiles.setdefault(fName, []).append(f"{dirF}/{fileF}")
        for (fName, featurePaths) in sorted(tfFiles.items()):
            chosenFPath = featurePaths[-1]
            for featurePath in sorted(set(featurePaths[0:-1])):
                if featurePath != chosenFPath:
                    self.featuresIgnored.setdefault(fName, []).append(featurePath)
            self.features[fName] = Data(chosenFPath, self.tmObj)
        self._getWriteLoc()
        debug(
            "{} features found and {} ignored".format(
                len(tfFiles),
                sum(len(x) for x in self.featuresIgnored.values()),
            ),
            tm=False,
        )

        self.featuresOnly = False

        if OTYPE not in self.features or OSLOTS not in self.features:
            info(
                f"Not all of the warp features {OTYPE} and {OSLOTS} "
                f"are present in\n{self.locationRep}"
            )
            info("Only the Feature and Edge APIs will be enabled")
            self.featuresOnly = True
        if OTEXT in self.features:
            self._loadFeature(OTEXT, optional=True)
        else:
            info((f'Warp feature "{OTEXT}" not found. Working without Text-API\n'))
            self.features[OTEXT] = Data(
                f"{OTEXT}.tf",
                self.tmObj,
                isConfig=True,
                metaData=OTEXT_DEFAULT,
            )
            self.features[OTEXT].dataLoaded = True

        good = True
        if not self.featuresOnly:
            self.warpDir = self.features[OTYPE].dirName
            self.precomputeList = []
            self.dep1Feats = []
            for (dep2, fName, method, dependencies) in PRECOMPUTE:
                thisGood = True
                if dep2 and OTEXT not in self.features:
                    continue
                if dep2 == 1:
                    self.dep1Feats.append(fName)
                elif dep2 == 2:
                    otextMeta = self.features[OTEXT].metaData
                    sFeatures = f"{KIND[fName]}Features"
                    sFeats = tuple(itemize(otextMeta.get(sFeatures, ""), ","))
                    dependencies = dependencies + sFeats
                for dep in dependencies:
                    if dep not in self.features:
                        warning(
                            "Missing dependency for computed data feature "
                            f'"{fName}": "{dep}"'
                        )
                        thisGood = False
                if not thisGood:
                    good = False
                self.features[fName] = Data(
                    f"{self.warpDir}/{fName}.x",
                    self.tmObj,
                    method=method,
                    dependencies=[self.features.get(dep, None) for dep in dependencies],
                )
                self.precomputeList.append((fName, dep2))
        self.good = good

    def _getWriteLoc(self, location=None, module=None):
        writeLoc = (
            ex(location)
            if location is not None
            else ""
            if len(self.locations) == 0
            else self.locations[-1]
        )
        writeMod = (
            module
            if module is not None
            else ""
            if len(self.modules) == 0
            else self.modules[-1]
        )
        self.writeDir = (
            f"{writeLoc}{writeMod}"
            if writeLoc == "" or writeMod == ""
            else f"{writeLoc}/{writeMod}"
        )

    def _precompute(self):
        tmObj = self.tmObj
        isSilent = tmObj.isSilent
        good = True

        for (fName, dep2) in self.precomputeList:
            ok = getattr(self, f'{fName.strip("_")}OK', False)
            if dep2 == 2 and not ok:
                continue
            if not self.features[fName].load(silent=isSilent()):
                good = False
                break
        self.good = good

    def _makeApi(self):
        if not self.good:
            return None

        tmObj = self.tmObj
        isSilent = tmObj.isSilent
        indent = tmObj.indent
        debug = tmObj.debug
        featuresOnly = self.featuresOnly

        silent = isSilent()
        api = Api(self)
        api.featuresOnly = featuresOnly

        if not featuresOnly:
            w0info = self.features[OTYPE]
            w1info = self.features[OSLOTS]

        if not featuresOnly:
            setattr(api.F, OTYPE, OtypeFeature(api, w0info.metaData, w0info.data))
            setattr(api.E, OSLOTS, OslotsFeature(api, w1info.metaData, w1info.data))

        requestedSet = set(self.featuresRequested)

        for fName in self.features:
            fObj = self.features[fName]
            if fObj.dataLoaded and not fObj.isConfig:
                if fObj.method:
                    if not featuresOnly:
                        feat = fName.strip("_")
                        ok = getattr(self, f"{feat}OK", False)
                        ap = api.C
                        if fName in [
                            fn
                            for (fn, dep2) in self.precomputeList
                            if not dep2 == 2 or ok
                        ]:
                            setattr(ap, feat, Computed(api, fObj.data))
                        else:
                            fObj.unload()
                            if hasattr(ap, feat):
                                delattr(api.C, feat)
                else:
                    if fName in requestedSet | self.textFeatures:
                        if fName in (OTYPE, OSLOTS, OTEXT):
                            continue
                        elif fObj.isEdge:
                            setattr(
                                api.E,
                                fName,
                                EdgeFeature(
                                    api, fObj.metaData, fObj.data, fObj.edgeValues
                                ),
                            )
                        else:
                            setattr(
                                api.F, fName, NodeFeature(api, fObj.metaData, fObj.data)
                            )
                    else:
                        if (
                            fName in (OTYPE, OSLOTS, OTEXT)
                            or fName in self.textFeatures
                        ):
                            continue
                        elif fObj.isEdge:
                            if hasattr(api.E, fName):
                                delattr(api.E, fName)
                        else:
                            if hasattr(api.F, fName):
                                delattr(api.F, fName)
                        fObj.unload()
        if not featuresOnly:
            addOtype(api)
            addNodes(api)
            addLocality(api)
            addText(api)
            addSearch(api, silent)
        indent(level=0)
        debug("All features loaded / computed - for details use TF.isLoaded()")
        self.api = api
        setattr(self, "isLoaded", self.api.isLoaded)
        return api

    def _updateApi(self):
        if not self.good:
            return None
        api = self.api
        tmObj = self.tmObj
        indent = tmObj.indent
        debug = tmObj.debug

        requestedSet = set(self.featuresRequested)

        for fName in self.features:
            fObj = self.features[fName]
            if fObj.dataLoaded and not fObj.isConfig:
                if not fObj.method:
                    if fName in requestedSet | self.textFeatures:
                        if fName in (OTYPE, OSLOTS, OTEXT):
                            continue
                        elif fObj.isEdge:
                            apiFobj = EdgeFeature(
                                api, fObj.metaData, fObj.data, fObj.edgeValues
                            )
                            setattr(api.E, fName, apiFobj)
                        else:
                            apiFobj = NodeFeature(api, fObj.metaData, fObj.data)
                            setattr(api.F, fName, apiFobj)
                    else:
                        if (
                            fName in (OTYPE, OSLOTS, OTEXT)
                            or fName in self.textFeatures
                        ):
                            continue
                        elif fObj.isEdge:
                            if hasattr(api.E, fName):
                                delattr(api.E, fName)
                        else:
                            if hasattr(api.F, fName):
                                delattr(api.F, fName)
                        fObj.unload()
        indent(level=0)
        debug("All additional features loaded - for details use TF.isLoaded()")

Initialize the core API for a corpus.

Top level management of

• locating TF feature files
• loading and saving feature data
• pre-computing auxiliary data
• caching pre-computed and compressed data

TF is initialized for a corpus. It will search a set of directories and catalogue all .tf files it finds there. These are the features you can subsequently load.

Here directories and subdirectories are strings with directory names separated by newlines, or iterables of directories.

Parameters

locations : string | iterable of strings, optional

The directories specified here are used as base locations in searching for TF feature files. In general, they will not searched directly, but certain subdirectories of them will be searched, specified by the modules parameter.

Defaults:

~/Downloads/text-fabric-data
~/text-fabric-data
~/github/text-fabric-data

So if you have stored your main TF dataset in text-fabric-data in one of these directories you do not have to pass a location to Fabric.

modules : string | iterable of strings

The directories specified in here are used as sub directories appended to the directories given by the locations parameter.

All .tf files (non-recursively) in any location/module will be added to the feature set to be loaded in this session. The order in modules is important, because if a feature occurs in multiple modules, the last one will be chosen. In this way you can easily override certain features in one module by features in an other module of your choice.

Default: ['']

So if you leave it out, TF will just search the paths specified in locations.

silent : string, optional SILENT_D

See Timestamp

_withGc : boolean, optional True

If False, it disables the Python garbage collector before loading features. Used to experiment with performance.

otext@ in modules

If modules contain features with a name starting with otext@, then the format definitions in these features will be added to the format definitions in the regular otext feature (which is a WARP feature). In this way, modules that define new features for text representation, also can add new formats to the Text-API.

Returns

object

An object from which you can call up all the of methods of the core API.

Subclasses

• Fabric

Instance variables

var banner

The banner Text-Fabric.

Will be shown just after start up, if the silence is not deep.

var features

Dictionary of all features that TF has found, whether loaded or not.

Under each feature name is all info about that feature.

The best use of this is to get the metadata of features:

TF.features['fff'].metaData

This works for all features fff that have been found, whether the feature is loaded or not.

If a feature is loaded, you can also use

F.fff.meta of E.fff.meta depending on whether fff is a node feature or an edge feature.

Do not print!

If a feature is loaded, its data is also in the feature info. This can be an enormous amount of information, and you can easily overwhelm your notebook if you print it.

var version

The version number of the TF library.

Methods

def clearCache(self)

Expand source code Browse git

def clearCache(self):
    """Clears the cache of compiled TF data.

    TF pre-computes data for you, so that it can be loaded faster.
    If the original data is updated, TF detects it,
    and will recompute that data.

    But there are cases, when the algorithms of TF have changed,
    without any changes in the data, where you might want to clear the cache
    of pre-computed results.

    Calling this function just does it, and it is equivalent with manually removing
    all `.tfx` files inside the hidden `.tf` directory inside your dataset.

    !!! hint "No need to load"
        It is not needed to execute a `TF.load()` first.

    See Also
    --------
    tf.clean
    """

    for (fName, fObj) in self.features.items():
        fObj.cleanDataBin()

Clears the cache of compiled TF data.

TF pre-computes data for you, so that it can be loaded faster. If the original data is updated, TF detects it, and will recompute that data.

But there are cases, when the algorithms of TF have changed, without any changes in the data, where you might want to clear the cache of pre-computed results.

Calling this function just does it, and it is equivalent with manually removing all .tfx files inside the hidden .tf directory inside your dataset.

No need to load

It is not needed to execute a TF.load() first.

See Also

tf.clean

def explore(self, silent='auto', show=True)

Expand source code Browse git

def explore(self, silent=SILENT_D, show=True):
    """Makes categorization of all features in the dataset.

    Parameters
    ----------
    silent: string, optional tf.core.timestamp.SILENT_D
        See `tf.core.timestamp.Timestamp`
    show: boolean, optional True
        If `False`, the resulting dictionary is delivered in `TF.featureSets`;
        if `True`, the dictionary is returned as function result.

    Returns
    -------
    dict | None
        A dictionary  with keys `nodes`, `edges`, `configs`, `computeds`.
        Under each key there is the set of feature names in that category.
        How this dictionary is delivered, depends on the parameter *show*.

    Notes
    -----
    !!! explanation "`configs`"
        These are configuration features, with metadata only, no data. E.g. `otext`.

    !!! explanation "`computeds`"
        These are blocks of pre-computed data, available under the `C` API,
        see `tf.core.computed.Computeds`.

    The sets do not indicate whether a feature is loaded or not.
    There are other functions that give you the loaded features:
    `tf.core.api.Api.Fall` for nodes and `tf.core.api.Api.Eall` for edges.
    """

    silent = silentConvert(silent)
    tmObj = self.tmObj
    isSilent = tmObj.isSilent
    setSilent = tmObj.setSilent
    info = tmObj.info

    wasSilent = isSilent()
    setSilent(silent)
    nodes = set()
    edges = set()
    configs = set()
    computeds = set()

    for (fName, fObj) in self.features.items():
        fObj.load(silent=silent, metaOnly=True)
        dest = None
        if fObj.method:
            dest = computeds
        elif fObj.isConfig:
            dest = configs
        elif fObj.isEdge:
            dest = edges
        else:
            dest = nodes
        dest.add(fName)
    info(
        "Feature overview: {} for nodes; {} for edges; {} configs; {} computed".format(
            len(nodes),
            len(edges),
            len(configs),
            len(computeds),
        )
    )
    self.featureSets = dict(
        nodes=nodes, edges=edges, configs=configs, computeds=computeds
    )
    setSilent(wasSilent)
    if show:
        return dict(
            (kind, tuple(sorted(kindSet)))
            for (kind, kindSet) in sorted(
                self.featureSets.items(), key=lambda x: x[0]
            )
        )

Makes categorization of all features in the dataset.

Parameters

silent : string, optional SILENT_D

See Timestamp

show : boolean, optional True

If False, the resulting dictionary is delivered in TF.featureSets; if True, the dictionary is returned as function result.

Returns

dict | None

A dictionary with keys nodes, edges, configs, computeds. Under each key there is the set of feature names in that category. How this dictionary is delivered, depends on the parameter show.

Notes

configs

These are configuration features, with metadata only, no data. E.g. otext.

computeds

These are blocks of pre-computed data, available under the C API, see Computeds.

The sets do not indicate whether a feature is loaded or not. There are other functions that give you the loaded features: Api.Fall() for nodes and Api.Eall() for edges.

def load(self, features, add=False, silent='auto')

Expand source code Browse git

def load(self, features, add=False, silent=SILENT_D):
    """Loads features from disk into RAM memory.

    Parameters
    ----------

    features: string | iterable
        Either a string containing space separated feature names, or an
        iterable of feature names.
        The feature names are just the names of `.tf` files
        without directory information and without extension.
    add: boolean, optional False
        The features will be added to the same currently loaded features, managed
        by the current API.
        Meant to be able to dynamically load features without reloading lots
        of features for nothing.
    silent: string, optional tf.core.timestamp.SILENT_D
        See `tf.core.timestamp.Timestamp`

    Returns
    -------
    boolean | object
        If `add` is `True` a boolean indicating success is returned.
        Otherwise, the result is a new `tf.core.api.Api`
        if the feature could be loaded, else `False`.
    """

    silent = silentConvert(silent)
    tmObj = self.tmObj
    isSilent = tmObj.isSilent
    setSilent = tmObj.setSilent
    indent = tmObj.indent
    debug = tmObj.debug
    warning = tmObj.warning
    error = tmObj.error
    cache = tmObj.cache
    reset = tmObj.reset
    featuresOnly = self.featuresOnly

    wasSilent = isSilent()
    setSilent(silent)
    indent(level=0, reset=True)
    self.sectionsOK = True
    self.structureOK = True
    self.good = True

    if self.good:
        featuresRequested = sorted(fitemize(features))
        if add:
            self.featuresRequested += featuresRequested
        else:
            self.featuresRequested = featuresRequested
        for fName in (OTYPE, OSLOTS, OTEXT):
            self._loadFeature(fName, optional=fName == OTEXT or featuresOnly)

    self.textFeatures = set()

    if self.good and not featuresOnly:
        if OTEXT in self.features:
            otextMeta = self.features[OTEXT].metaData
            for otextMod in self.features:
                if otextMod.startswith(OTEXT + "@"):
                    self._loadFeature(otextMod)
                    otextMeta.update(self.features[otextMod].metaData)
            self.sectionFeats = itemize(otextMeta.get("sectionFeatures", ""), ",")
            self.sectionTypes = itemize(otextMeta.get("sectionTypes", ""), ",")
            self.structureFeats = itemize(
                otextMeta.get("structureFeatures", ""), ","
            )
            self.structureTypes = itemize(otextMeta.get("structureTypes", ""), ",")
            (self.cformats, self.formatFeats) = collectFormats(otextMeta)

            if not (0 < len(self.sectionTypes) <= 3) or not (
                0 < len(self.sectionFeats) <= 3
            ):
                if not add:
                    warning(
                        f"Dataset without sections in {OTEXT}:"
                        f"no section functions in the T-API"
                    )
                self.sectionsOK = False
            else:
                self.textFeatures |= set(self.sectionFeats)
                self.sectionFeatsWithLanguage = tuple(
                    f
                    for f in self.features
                    if f == self.sectionFeats[0]
                    or f.startswith(f"{self.sectionFeats[0]}@")
                )
                self.textFeatures |= set(self.sectionFeatsWithLanguage)
            if not self.structureTypes or not self.structureFeats:
                if not add:
                    debug(
                        f"Dataset without structure sections in {OTEXT}:"
                        f"no structure functions in the T-API"
                    )
                self.structureOK = False
            else:
                self.textFeatures |= set(self.structureFeats)

            formatFeats = set(self.formatFeats)
            self.textFeatures |= formatFeats

            for fName in self.textFeatures:
                self._loadFeature(fName, optional=fName in formatFeats)

            dep1Feats = self.dep1Feats
            if dep1Feats:
                cformats = self.cformats
                tFormats = {}
                tFeats = set()
                for (fmt, (otpl, tpl, featData)) in cformats.items():
                    feats = set(chain.from_iterable(x[0] for x in featData))
                    tFormats[fmt] = tuple(sorted(feats))
                    tFeats |= feats
                tFeats = tuple(sorted(tFeats))
                extraDependencies = [tFormats]
                for tFeat in tFeats:
                    featData = self.features[tFeat].data
                    extraDependencies.append((tFeat, featData))
                for cFeat in dep1Feats:
                    self.features[cFeat].dependencies += extraDependencies

        else:
            self.sectionsOK = False
            self.structureOK = False

    if self.good and not featuresOnly:
        self._precompute()

    if self.good:
        reset()
        for fName in self.featuresRequested:
            self._loadFeature(fName)
            if not self.good:
                indent(level=0)
                cache()
                error("Not all features could be loaded / computed")
                result = False
                break
            reset()

    if self.good:
        if add:
            try:
                self._updateApi()
                result = True
            except MemoryError:
                console(MEM_MSG)
                result = False
        else:
            try:
                result = self._makeApi()
            except MemoryError:
                console(MEM_MSG)
                result = False
    else:
        result = False

    setSilent(wasSilent)
    return result

Loads features from disk into RAM memory.

Parameters

features : string | iterable

Either a string containing space separated feature names, or an iterable of feature names. The feature names are just the names of .tf files without directory information and without extension.

add : boolean, optional False

The features will be added to the same currently loaded features, managed by the current API. Meant to be able to dynamically load features without reloading lots of features for nothing.

silent : string, optional SILENT_D

See Timestamp

Returns

boolean | object

If add is True a boolean indicating success is returned. Otherwise, the result is a new Api if the feature could be loaded, else False.

def loadAll(self, silent='auto')

Expand source code Browse git

def loadAll(self, silent=SILENT_D):
    """Load all loadable features.

    Parameters
    ----------
    silent: string, optional tf.core.timestamp.SILENT_D
        See `tf.core.timestamp.Timestamp`
    """

    silent = silentConvert(silent)
    api = self.load("", silent=silent)
    allFeatures = self.explore(silent=silent, show=True)
    loadableFeatures = allFeatures["nodes"] + allFeatures["edges"]
    self.load(loadableFeatures, add=True, silent=silent)
    return api

Load all loadable features.

Parameters

silent : string, optional SILENT_D

See Timestamp

def save(self,
nodeFeatures: Dict[str, Dict[int, str | int]] = {},
edgeFeatures: Dict[str, Dict[int, Set[int] | Dict[int, str | int]]] = {},
metaData: Dict[str, Dict[str, str]] = {},
location=None,
module=None,
silent='auto')

Expand source code Browse git

def save(
    self,
    nodeFeatures: nodeFeatureDict = {},
    edgeFeatures: edgeFeatureDict = {},
    metaData: metaDataDict = {},
    location=None,
    module=None,
    silent=SILENT_D,
):
    """Saves newly generated data to disk as TF features, nodes and / or edges.

    If you have collected feature data in dictionaries, keyed by the
    names of the features, and valued by their feature data,
    then you can save that data to `.tf` feature files on disk.

    It is this easy to export new data as features:
    collect the data and metadata of the features and feed it in an orderly way
    to `TF.save()` and there you go.

    Parameters
    ----------
    nodeFeatures: dict of dict
        The data of a node feature is a dictionary with nodes as keys (integers!)
        and strings or numbers as (feature) values.
        This parameter holds all those dictionaries, keyed by feature name.

    edgeFeatures: dict of dict
        The data of an edge feature is a dictionary with nodes as keys, and sets or
        dictionaries as values. These sets should be sets of nodes (integers!),
        and these dictionaries should have nodes as keys and strings or numbers
        as values.
        This parameter holds all those dictionaries, keyed by feature name.

    metaData: dict of  dict
        The meta data for every feature to be saved is a key-value dictionary.
        This parameter holds all those dictionaries, keyed by feature name.

        !!! explanation "value types"
            The type of the feature values (`int` or `str`) should be specified
            under key `valueType`.

        !!! explanation "edge values"
            If you save an edge feature, and there are values in that edge feature,
            you have to say so, by specifying `edgeValues=True`
            in the metadata for that feature.

        !!! explanation "generic metadata"
            This parameter may also contain fields under the empty name.
            These fields will be added to all features in `nodeFeatures` and
            `edgeFeatures`.

        !!! explanation "configuration features"
            If you need to write the *configuration* feature `otext`,
            which is a metadata-only feature, just
            add the metadata under key `otext` in this parameter and make sure
            that `otext` is not a key in `nodeFeatures` nor in
            `edgeFeatures`.
            These fields will be written into the separate configuration
            feature `otext`, with no data associated.

    location: dict
        The (meta)data will be written to the very last directory that TF searched
        when looking for features (this is determined by the
        `locations` and `modules` parameters in `tf.fabric.Fabric`.

        If both `locations` and `modules` are empty, writing will take place
        in the current directory.

        But you can override it:

        If you pass `location=something`, TF will save in `something/mod`,
        where `mod` is the last member of the `modules` parameter of TF.

    module: dict
        This is an additional way of overriding the default location
        where TF saves new features. See the *location* parameter.

        If you pass `module=something`, TF will save in `loc/something`,
        where `loc` is the last member of the `locations` parameter of TF.

        If you pass `location=path1` and `module=path2`,
        TF will save in `path1/path2`.

    silent: string, optional tf.core.timestamp.SILENT_D
        See `tf.core.timestamp.Timestamp`
    """

    silent = silentConvert(silent)
    tmObj = self.tmObj
    isSilent = tmObj.isSilent
    setSilent = tmObj.setSilent
    indent = tmObj.indent
    info = tmObj.info
    error = tmObj.error

    good = True
    wasSilent = isSilent()
    setSilent(silent)
    indent(level=0, reset=True)
    self._getWriteLoc(location=location, module=module)
    configFeatures = dict(
        f
        for f in metaData.items()
        if f[0] != "" and f[0] not in nodeFeatures and f[0] not in edgeFeatures
    )
    info(
        "Exporting {} node and {} edge and {} configuration features to {}:".format(
            len(nodeFeatures),
            len(edgeFeatures),
            len(configFeatures),
            self.writeDir,
        )
    )
    todo = []
    for fName in sorted(nodeFeatures):
        todo.append((fName, nodeFeatures[fName], False, False))
    for fName in sorted(edgeFeatures):
        todo.append((fName, edgeFeatures[fName], True, False))
    for fName in sorted(configFeatures):
        todo.append((fName, configFeatures[fName], None, True))
    total = collections.Counter()
    failed = collections.Counter()
    maxSlot = None
    maxNode = None
    slotType = None
    if OTYPE in nodeFeatures:
        info(f"VALIDATING {OSLOTS} feature")
        otypeData = nodeFeatures[OTYPE]
        if type(otypeData) is tuple:
            (otypeData, slotType, maxSlot, maxNode) = otypeData
        elif 1 in otypeData:
            slotType = otypeData[1]
            maxSlot = max(n for n in otypeData if otypeData[n] == slotType)
            maxNode = max(otypeData)
    if OSLOTS in edgeFeatures:
        info(f"VALIDATING {OSLOTS} feature")
        oslotsData = edgeFeatures[OSLOTS]
        if type(oslotsData) is tuple:
            (oslotsData, maxSlot, maxNode) = oslotsData
        if maxSlot is None or maxNode is None:
            error(f"ERROR: cannot check validity of {OSLOTS} feature")
            good = False
        else:
            info(f"maxSlot={maxSlot:>11}")
            info(f"maxNode={maxNode:>11}")
            maxNodeInData = max(oslotsData)
            minNodeInData = min(oslotsData)

            mappedSlotNodes = []
            unmappedNodes = []
            fakeNodes = []

            start = min((maxSlot + 1, minNodeInData))
            end = max((maxNode, maxNodeInData))
            for n in range(start, end + 1):
                if n in oslotsData:
                    if n <= maxSlot:
                        mappedSlotNodes.append(n)
                    elif n > maxNode:
                        fakeNodes.append(n)
                else:
                    if maxSlot < n <= maxNode:
                        unmappedNodes.append(n)

            if mappedSlotNodes:
                error(f"ERROR: {OSLOTS} maps slot nodes")
                error(makeExamples(mappedSlotNodes), tm=False)
                good = False
            if fakeNodes:
                error(f"ERROR: {OSLOTS} maps nodes that are not in {OTYPE}")
                error(makeExamples(fakeNodes), tm=False)
                good = False
            if unmappedNodes:
                error(f"ERROR: {OSLOTS} fails to map nodes:")
                unmappedByType = {}
                for n in unmappedNodes:
                    unmappedByType.setdefault(
                        otypeData.get(n, "_UNKNOWN_"), []
                    ).append(n)
                for (nType, nodes) in sorted(
                    unmappedByType.items(),
                    key=lambda x: (-len(x[1]), x[0]),
                ):
                    error(f"--- unmapped {nType:<10} : {makeExamples(nodes)}")
                good = False

        if good:
            info(f"OK: {OSLOTS} is valid")

    for (fName, data, isEdge, isConfig) in todo:
        edgeValues = False
        fMeta = {}
        fMeta.update(metaData.get("", {}))
        fMeta.update(metaData.get(fName, {}))
        if fMeta.get("edgeValues", False):
            edgeValues = True
        if "edgeValues" in fMeta:
            del fMeta["edgeValues"]
        fObj = Data(
            f"{self.writeDir}/{fName}.tf",
            self.tmObj,
            data=data,
            metaData=fMeta,
            isEdge=isEdge,
            isConfig=isConfig,
            edgeValues=edgeValues,
        )
        tag = "config" if isConfig else "edge" if isEdge else "node"
        if fObj.save(nodeRanges=fName == OTYPE, overwrite=True, silent=silent):
            total[tag] += 1
        else:
            failed[tag] += 1
    indent(level=0)
    info(
        f"""Exported {total["node"]} node features"""
        f""" and {total["edge"]} edge features"""
        f""" and {total["config"]} config features"""
        f""" to {self.writeDir}"""
    )
    if len(failed):
        for (tag, nf) in sorted(failed.items()):
            error(f"Failed to export {nf} {tag} features")
        good = False

    setSilent(wasSilent)
    return good

Saves newly generated data to disk as TF features, nodes and / or edges.

If you have collected feature data in dictionaries, keyed by the names of the features, and valued by their feature data, then you can save that data to .tf feature files on disk.

It is this easy to export new data as features: collect the data and metadata of the features and feed it in an orderly way to TF.save() and there you go.

Parameters

nodeFeatures : dict of dict

The data of a node feature is a dictionary with nodes as keys (integers!) and strings or numbers as (feature) values. This parameter holds all those dictionaries, keyed by feature name.

edgeFeatures : dict of dict

The data of an edge feature is a dictionary with nodes as keys, and sets or dictionaries as values. These sets should be sets of nodes (integers!), and these dictionaries should have nodes as keys and strings or numbers as values. This parameter holds all those dictionaries, keyed by feature name.

metaData : dict of dict

The meta data for every feature to be saved is a key-value dictionary. This parameter holds all those dictionaries, keyed by feature name.

value types

The type of the feature values (int or str) should be specified under key valueType.

edge values

If you save an edge feature, and there are values in that edge feature, you have to say so, by specifying edgeValues=True in the metadata for that feature.

generic metadata

This parameter may also contain fields under the empty name. These fields will be added to all features in nodeFeatures and edgeFeatures.

configuration features

If you need to write the configuration feature otext, which is a metadata-only feature, just add the metadata under key otext in this parameter and make sure that otext is not a key in nodeFeatures nor in edgeFeatures. These fields will be written into the separate configuration feature otext, with no data associated.

location : dict

The (meta)data will be written to the very last directory that TF searched when looking for features (this is determined by the locations and modules parameters in Fabric.

If both locations and modules are empty, writing will take place in the current directory.

But you can override it:

If you pass location=something, TF will save in something/mod, where mod is the last member of the modules parameter of TF.

module : dict

This is an additional way of overriding the default location where TF saves new features. See the location parameter.

If you pass module=something, TF will save in loc/something, where loc is the last member of the locations parameter of TF.

If you pass location=path1 and module=path2, TF will save in path1/path2.

silent : string, optional SILENT_D

See Timestamp