On Fri, 3 Mar 2006, david mugnai wrote:
[snip]
>
> If I don't misunderstood the problem, you can define an "init" method for
> your module_g
>
> (code not tested)
>
> module_g.py
> -----------
>
> _functions = {}
> def init(mathmodule):
> _function['sqrt'] = getattr(mathmodule, 'sqrt', None)
>
> def _get(name):
> try:
> return _functions[name]
> except KeyError:
> raise TypeError("you have to initialize module_g")
>
> def sqrt(x):
> return _get('sqrt')(x)
>
> main.py
> -------
>
> import math
> import module_g
>
> module_g.init(math)
> print module_g.sqrt(2)
Thanks, this gets me close. Is there anything really bad about the
following? It works exactly as I would like, but I don't want to get in
trouble down the road:
module_f
--------
import math as my_math
def set_math(custom_math):
globals()['my_math'] = custom_math
def f(x):
return my_math.sqrt(x)
>>> import module_f
>>> module_f.f(2)
1.4142135623730951
>>> import cmath
>>> module_f.set_math(cmath)
>>> module_f.f(2j)
(1+1j)
Or, if one wants to use the "from __ import *" form:
from math import *
def set_math(custom_math):
globals().update(custom_math.__dict__)
def f(x):
return sqrt(x)
Michael
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