nltk study

• class AbstractCollocationFinder(object):

• """An abstract base class for collocationfinders whose purpose is to collect collocation candidate frequencies, filterand rank them.

• As a minimum, collocation finders requirethe frequencies of each word in a corpus, and the joint frequency of word tuples.This data should be provided through nltk.probability.FreqDist objects or an identicalinterface."""

• class BigramCollocationFinder(AbstractCollocationFinder):

• """A tool for the findingand ranking of bigram collocations or other association measures. It is oftenuseful to use from_words() rather than constructing an instance directly."""

• class TrigramCollocationFinder(AbstractCollocationFinder):

• """A tool for the findingand ranking of trigram collocations or other association measures. It is oftenuseful to use from_words() rather than constructing an instance directly."""

• class QuadgramCollocationFinder(AbstractCollocationFinder):

• """A tool for the findingand ranking of quadgram collocations or other association measures. It is oftenuseful to use from_words() rather than constructing an instance directly."""

• def decorator(caller):

• """General purpose decorator factory: takes acaller function as input and returns a decorator with the same attributes.A caller function is any function likethis::

• def new_wrapper(wrapper, model):

• """An improvement overfunctools.update_wrapper. The wrapper is a generic callable object. It works bygenerating a copy of the wrapper with the right signature and by updating thecopy, not the original.

• Moreovoer, 'model' can be a dictionary withkeys 'name', 'doc', 'module', 'dict', 'defaults'."""

• def getinfo(func):

• """Returns an info dictionary containing:

• - name (the name of the function : str)

• - argnames (the names of the arguments :list)

• - defaults (the values of the defaultarguments : tuple)

• - signature (the signature : str)

• - fullsignature (the full signature :Signature)

• - doc (the docstring : str)

• - module (the module name : str)

• - dict (the function __dict__ : str)