functools_method.py

#!/usr/bin/env python


import functools


class MyClass(object):
    """Demonstration class for functools"""

    def method1(self, a, b=2):
        """Docstring for method1()."""
        print ' called method1 with:', (self, a, b)
        return

    def method2(self, c, d=5):
        """Docstring for method2"""
        print ' called method2 with:', (self, c, d)
        return
    wrapped_method2 = functools.partial(method2, 'wrapped c')
    functools.update_wrapper(wrapped_method2, method2)

    def __call__(self, e, f=6):
        """Docstring for MyClass.__call__"""
        print ' called object with:', (self, e, f)
        return


def show_details(name, f):
    """shows details of a callable object."""
    print '%s:' % name
    print ' object:', f
    print ' __name__:',
    try:
        print f.__name__
    except AttributeError:
        print '(no __name__)'
    print ' __doc__', repr(f.__doc__)
    return

o = MyClass()

show_details('method1 straight', o.method1)
o.method1('no default for a', b=3)
print

p1 = functools.partial(o.method1, b=4)
functools.update_wrapper(p1, o.method1)
show_details('method1 wrapper', p1)
p1('a goes here')
print

show_details('wrapped method2', o.wrapped_method2)
o.wrapped_method2('no default for c', d=6)
print

show_details('instance', o)
o('no default for e')
print

p2 = functools.partial(o, f=7)
show_details('instance wrapper', p2)
p2('e goes here')