multiple namespaces within a single module?
Peter Otten
__peter__ at web.de
Thu Feb 9 16:53:16 EST 2012
Ethan Furman wrote:
> Peter Otten wrote:
>> jkn wrote:
>>
>>> is it possible to have multiple namespaces within a single python
>>> module?
>>
>> Unless you are abusing classes I don't think so.
>
>
> Speaking of...
>
> <code>
> class NameSpace(object):
> def __init__(self, globals):
> self.globals = globals
> self.current_keys = list(globals.keys())
> def __enter__(self):
> return self
> def __exit__(self, *args):
> new_items = []
> for key, value in self.globals.items():
> if key not in self.current_keys and value is not self:
> new_items.append((key, value))
> for key, value in new_items:
> setattr(self, key, value)
> del self.globals[key]
>
> if __name__ == '__main__':
> with NameSpace(globals()) as a:
> def function():
> print('inside a!')
> with NameSpace(globals()) as b:
> def function():
> print('inside b!')
>
> a.function()
> b.function()
> print(vars())
> </code>
>
> The NameSpace objects do *not* get their own copy of globals(), but for
> functions, etc., it should work fine. As a bonus the above code works
> for both 2.x and 3.x.
Hm, what about
with NameSpace(globals()) as a:
x = "inside a!"
def function():
print(x)
with NameSpace(globals()) as b:
x = "inside b!"
def function():
print(x)
x = "inside main!"
a.function()
b.function()
More information about the Python-list
mailing list