functools_update_wrapper.py

#!/usr/bin/env python


import functools


def myfunc(a, b=2):
    """docstring for myfunc()."""
    print ' called myfunc with:', (a, b)
    return


def show_details(name, f):
    """Show 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__)
    print
    return

show_details('myfunc', myfunc)

p1 = functools.partial(myfunc, b=4)
show_details('raw wrapper', p1)

print 'Updating wrapper:'
print ' assign:', functools.WRAPPER_ASSIGNMENTS
print ' update:', functools.WRAPPER_UPDATES
print

functools.update_wrapper(p1, myfunc)
show_details('updated wrapper', p1)