Fuzzyman wrote:
>> I'd like to construct the code object so that it takes the parameters
>> from the enclosing scope (the context I pass into exec I guess),
>> without clobbering any local variables that may be defined in the code
>> object.
>>
>> Anyone got any clues ?
Does this do what you wanted? Instead of messing about with the code object
just work out which values from the namespace the function actually
expects.
>>> def callfromnamespace(fn, namespace):
names = fn.func_code.co_varnames[:fn.func_code.co_argcount]
fn(**dict((name, namespace[name])
for name in names if name in namespace))
>>> def f(x, y=99):
z = 2
print x, y, z
>>> x = 42
>>> callfromnamespace(f, globals())
42 99 2
>>> y = 37
>>> callfromnamespace(f, globals())
42 37 2
>>> def testme():
x = 3
callfromnamespace(f, vars())
y = 9
callfromnamespace(f, vars())
>>> testme()
3 99 2
3 9 2
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