A look at lexical scoping of functions defined inside for-loops, in Python.

forloop_function_scope.py

"A look at lexical scoping of functions defined inside for-loops, in Python."

import functools


def foo():
    return 'foo'


def bar():
    return 'bar'


def quux():
    return 'quux'


def scan(context=globals()):
    fns = {}
    for name in ('foo', 'bar', 'quux'):
        fn = context[name]
        @functools.wraps(fn)
        def handle(*a, **kw):
            return '%s: %s' % (name, fn(*a, **kw))
        fns[name] = handle
    return fns


if __name__ == '__main__':
    # On CPython 2.7.3:
    #
    # foo - quux: quux
    # bar - quux: quux
    # quux - quux: quux

    fns = scan()
    for name in ('foo', 'bar', 'quux'):
        print '%s - %s' % (name, fns[name]())