the global keyword:

[Rick Johnson]

On Tuesday, June 21, 2016 at 5:20:53 PM UTC-5, Rick Johnson wrote:
>     py> import sys
>     py> def foo():
>     ...     print 'My name is Foo!'
>     py> sys.modules['__builtin__'].__dict__['foo_func'] = foo
>     py> foo()
>     My name is Foo!
>     py> foo = 'bar'
>     py> foo
>     'bar'
>     py> sys.modules['__builtin__'].__dict__['foo_func']
>     <function foo at 0x02810330>

Oops. Made a innocent boo-boo here. Let me try again.

    py> import sys
    py> def foo():
    ...     print "Hey, my name is foo!"
    py> sys.modules['__builtin__'].__dict__['foo_func'] = foo
    py> foo_func()
    Hey, my name is foo!
    py> foo_func = 'bar'
    py> foo_func
    'bar'
    py> sys.modules['__builtin__'].__dict__['foo_func']
    <function foo at 0x026C0330>