o iS @sdZdZgdZddlZejddZddejDe_ddlZee_ddZd d Zdd d Z d dZ ddZ ddZ ddZ ddZe ddZdS)a Decorator module by Michele Simionato Copyright Michele Simionato, distributed under the terms of the BSD License (see below). http://www.phyast.pitt.edu/~micheles/python/documentation.html Included in NLTK for its support of a nice memoization decorator. zrestructuredtext en) decorator new_wrappergetinfoNcCs g|] }|rdt|vr|qS)nltk)str).0pr J/var/www/edux/Edux_v2/venv/lib/python3.10/site-packages/nltk/decorators.py s r cCsht|ddd}t|D]\}}|ddkr(|d|d||<q|||<qd|S)z For retrocompatibility reasons, we don't use a standard Signature. Instead, we use the string generated by this method. Basically, from a Signature we create a string and remove the default values. ,=rz, )rsplit enumeratecountindexstripjoin) signature listsignaturecounterparamr r r __legacysignatures  rc Cst|s t|s Jt|}|dd\}}}t|}|r%|||r,||t|}t|}t|drA|j }|j } n|j }|j } t |j||||j|j|j|j| |d S)a Returns an info dictionary containing: - name (the name of the function : str) - argnames (the names of the arguments : list) - defaults (the values of the default arguments : tuple) - signature (the signature : str) - fullsignature (the full signature : Signature) - doc (the docstring : str) - module (the module name : str) - dict (the function __dict__ : str) >>> def f(self, x=1, y=2, *args, **kw): pass >>> info = getinfo(f) >>> info["name"] 'f' >>> info["argnames"] ['self', 'x', 'y', 'args', 'kw'] >>> info["defaults"] (1, 2) >>> info["signature"] 'self, x, y, *args, **kw' >>> info["fullsignature"] N __closure__) nameargnamesr fullsignaturedefaultsdocmoduledictglobalsclosure)inspectismethod isfunctiongetfullargspeclistappendrrhasattrr __globals__ func_closure func_globalsr#__name__ __defaults____doc__ __module____dict__) funcargspecregargsvarargs varkwargsrrr_closure_globalsr r r r,s6     rcCsN|pt|}|d|_|d|_|d|_|j|d|d|_||_|S)z akin to functools.update_wrapperrr!r"r#r )rr0r2r3r4updater1 undecorated)wrappermodelinfodictr r r update_wrapperls     rAcCsPt|tr|}nt|}d|dvsJdd|}t|t|d}t|||S)aA An improvement over functools.update_wrapper. The wrapper is a generic callable object. It works by generating a copy of the wrapper with the right signature and by updating the copy, not the original. Moreovoer, 'model' can be a dictionary with keys 'name', 'doc', 'module', 'dict', 'defaults'. _wrapper_rz("_wrapper_" is a reserved argument name!z.lambda %(signature)s: _wrapper_(%(signature)s))rB) isinstancer#revalrA)r>r?r@srcfuncopyr r r rxs  rcstfddS)Ncsjg|Ri|SN)call)akr5selfr r sz__call__..)r)rLr5r rKr __call__srNcCs6tt|}d|vrtdd|vrtdt|_|S)z Take a class with a ``.caller`` method and return a callable decorator object. It works by adding a suitable __call__ method to the class; it raises a TypeError if the class already has a nontrivial __call__ method. rNz=You cannot decorate a class with a nontrivial __call__ methodrHz2You cannot decorate a class without a .call method)setdir TypeErrorrN)clsattrsr r r decorator_factorys rTcs(tr tSfdd}t|S)a General purpose decorator factory: takes a caller function as input and returns a decorator with the same attributes. A caller function is any function like this:: def caller(func, *args, **kw): # do something return func(*args, **kw) Here is an example of usage: >>> @decorator ... def chatty(f, *args, **kw): ... print("Calling %r" % f.__name__) ... return f(*args, **kw) >>> chatty.__name__ 'chatty' >>> @chatty ... def f(): pass ... >>> f() Calling 'f' decorator can also take in input a class with a .caller method; in this case it converts the class into a factory of callable decorator objects. See the documentation for an example. csNt|}|d}d|vsd|vrJdd|}t|t|d}t|||S)Nr_call__func_z2You cannot use _call_ or _func_ as argument names!z3lambda %(signature)s: _call_(_func_, %(signature)s))rVrU)rrDr#rA)r5r@rrEdec_funccallerr r _decorators zdecorator.._decorator)r&isclassrTrA)rYrZr rXr rs   rcCs6zt||WSty|}t||||YSw)z'Similar to .setdefault in dictionaries.)getattrAttributeErrorsetattr)objr default_thunkdefaultr r r getattr_s   rbcGs0t|dt}||vr||S||}|||<|S)N memoize_dic)rbr#)r5argsdicresultr r r memoizes rgrG)r2 __docformat____all__syspath OLD_SYS_PATHr&rrrArrNrTrrbrgr r r r s$ @ /