[Python-ideas] 'Injecting' objects as function-local constants

Wed Jun 15 21:23:41 CEST 2011

Here is the source if anyone wants it.
--Alex
On Wed, Jun 15, 2011 at 3:04 PM, Terry Reedy <tjreedy at udel.edu> wrote:
> On 6/15/2011 11:48 AM, Alex Light wrote:
>> Alex Light dixit (2011年06月14日, 13:44):
>>>> > >>> frmglobals = func.__globals__.copy()
>> > >>> func.__globals__.update(localArgs)
>> > >>> ret= func(*args, **kwargs)
>> > >>> func.__globals__.clear()
>> > >>> func.__globals__.update(frmglobals)
>>>> >>> frmglobals = func.__globals__.copy()
>> >>> func.__globals__.update(localArgs)
>> >>> ret= func(*args, **kwargs)
>> >>> func.__globals__.clear()
>> >>> func.__globals__.update(frmglobals)
>>>> with this one:
>>>> >>> with _modifyGlobals(func.__globals__, localArgs):
>> >>> ret = func(*args, **kwargs)
>>>> with _modifyGlobals defined as:
>>>> >>>from contextlib import contextmanager
>> >>>
>> >>>@contextmanager
>> >>>def _modifyGlobals(glbls, additions):
>> >>> frmglbls = glbls.copy()
>> >>> try:
>> >>> glbls.update(additions)
>> >>> yield
>> >>> finally:
>> >>> glbls.clear()
>> >>> glbls.update(frmglbls)
>>>> Posting code with all the '>>>' prompts added makes it terribly hard to cut
> and paste to try it out.
>> --
> Terry Jan Reedy
>>> _______________________________________________
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> Python-ideas at python.org
> http://mail.python.org/mailman/listinfo/python-ideas
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