diff options
Diffstat (limited to 'lib/python2.7/functools.py')
-rw-r--r-- | lib/python2.7/functools.py | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/lib/python2.7/functools.py b/lib/python2.7/functools.py deleted file mode 100644 index 53680b8..0000000 --- a/lib/python2.7/functools.py +++ /dev/null @@ -1,100 +0,0 @@ -"""functools.py - Tools for working with functions and callable objects -""" -# Python module wrapper for _functools C module -# to allow utilities written in Python to be added -# to the functools module. -# Written by Nick Coghlan <ncoghlan at gmail.com> -# Copyright (C) 2006 Python Software Foundation. -# See C source code for _functools credits/copyright - -from _functools import partial, reduce - -# update_wrapper() and wraps() are tools to help write -# wrapper functions that can handle naive introspection - -WRAPPER_ASSIGNMENTS = ('__module__', '__name__', '__doc__') -WRAPPER_UPDATES = ('__dict__',) -def update_wrapper(wrapper, - wrapped, - assigned = WRAPPER_ASSIGNMENTS, - updated = WRAPPER_UPDATES): - """Update a wrapper function to look like the wrapped function - - wrapper is the function to be updated - wrapped is the original function - assigned is a tuple naming the attributes assigned directly - from the wrapped function to the wrapper function (defaults to - functools.WRAPPER_ASSIGNMENTS) - updated is a tuple naming the attributes of the wrapper that - are updated with the corresponding attribute from the wrapped - function (defaults to functools.WRAPPER_UPDATES) - """ - for attr in assigned: - setattr(wrapper, attr, getattr(wrapped, attr)) - for attr in updated: - getattr(wrapper, attr).update(getattr(wrapped, attr, {})) - # Return the wrapper so this can be used as a decorator via partial() - return wrapper - -def wraps(wrapped, - assigned = WRAPPER_ASSIGNMENTS, - updated = WRAPPER_UPDATES): - """Decorator factory to apply update_wrapper() to a wrapper function - - Returns a decorator that invokes update_wrapper() with the decorated - function as the wrapper argument and the arguments to wraps() as the - remaining arguments. Default arguments are as for update_wrapper(). - This is a convenience function to simplify applying partial() to - update_wrapper(). - """ - return partial(update_wrapper, wrapped=wrapped, - assigned=assigned, updated=updated) - -def total_ordering(cls): - """Class decorator that fills in missing ordering methods""" - convert = { - '__lt__': [('__gt__', lambda self, other: not (self < other or self == other)), - ('__le__', lambda self, other: self < other or self == other), - ('__ge__', lambda self, other: not self < other)], - '__le__': [('__ge__', lambda self, other: not self <= other or self == other), - ('__lt__', lambda self, other: self <= other and not self == other), - ('__gt__', lambda self, other: not self <= other)], - '__gt__': [('__lt__', lambda self, other: not (self > other or self == other)), - ('__ge__', lambda self, other: self > other or self == other), - ('__le__', lambda self, other: not self > other)], - '__ge__': [('__le__', lambda self, other: (not self >= other) or self == other), - ('__gt__', lambda self, other: self >= other and not self == other), - ('__lt__', lambda self, other: not self >= other)] - } - roots = set(dir(cls)) & set(convert) - if not roots: - raise ValueError('must define at least one ordering operation: < > <= >=') - root = max(roots) # prefer __lt__ to __le__ to __gt__ to __ge__ - for opname, opfunc in convert[root]: - if opname not in roots: - opfunc.__name__ = opname - opfunc.__doc__ = getattr(int, opname).__doc__ - setattr(cls, opname, opfunc) - return cls - -def cmp_to_key(mycmp): - """Convert a cmp= function into a key= function""" - class K(object): - __slots__ = ['obj'] - def __init__(self, obj, *args): - self.obj = obj - def __lt__(self, other): - return mycmp(self.obj, other.obj) < 0 - def __gt__(self, other): - return mycmp(self.obj, other.obj) > 0 - def __eq__(self, other): - return mycmp(self.obj, other.obj) == 0 - def __le__(self, other): - return mycmp(self.obj, other.obj) <= 0 - def __ge__(self, other): - return mycmp(self.obj, other.obj) >= 0 - def __ne__(self, other): - return mycmp(self.obj, other.obj) != 0 - def __hash__(self): - raise TypeError('hash not implemented') - return K |