Ron_Adam <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> Is there a way to hide global names from a function or class?
>
> I want to be sure that a function doesn't use any global variables by
> mistake. So hiding them would force a name error in the case that I
> omit an initialization step. This might be a good way to quickly
> catch some hard to find, but easy to fix, errors in large code blocks.
def noglobals(f):
. import new
. return new.function(
. f.func_code,
. {'__builtins__':__builtins__},
. f.func_name,
. f.func_defaults,
. f.func_closure
. )
You can use it with the Python 2.4 @decorator syntax:
@noglobals
def a(...):
. # code here
Doing this for a class is a little more work. You will need dig inside
to perform this treatment on each method separately and handle new and
old-style classes a bit differently.
Note that this kind of function may declare globals. They will be
persistent but private to the function.
Oren
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