On Fri, 3 Mar 2006, Steven D'Aprano wrote:
> ... you can do this:
>
> import my_module
> my_module.set_environment("math") # or cmath, or numeric, or whatever
>
> Your my_module will be like this:
>
> # Warning: untested code.
> ENVIRON = None # global variables sometimes have their uses
>
> def f(x):
> if ENVIRON is None:
> raise ValueError("Uninitialised module!")
> # or use a custom exception
> return ENVIRON.sqrt(x)
>
> def set_environment(name):
> global ENVIRON
> ENVIRON = __import__(name)
>
>
> Does this help?
Yes. However, this raises a question: Is this any different than
directly modifying the globals, or is it just syntactic sugar.
import math as my_math
def set_environment(name):
globals()['ENVIRON'] = __import__(name)
Thanks,
Michael.
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