Scope

[Elliot Temple]

I want to write a function, foo, so the following works:

def main():
     n = 4
     foo(n)
     print n

#it prints 7

if foo needs to take different arguments, that'd be alright.

Is this possible?



I already tried this (below), which doesn't work.  foo only changes  
the global n.


n = 3
def main():
     def foo(var, context, c2):
         exec var + " = 7" in context, c2

     n = 4
     foo("n", locals(), globals())
     print n

if __name__ == '__main__': main()

print n


And of course I tried:

 >>> def inc(n):
...  n += 3
...
 >>> a = 4
 >>> inc(a)
 >>> a
4

-- Elliot Temple
http://www.curi.us/


---
[This E-mail scanned for viruses by Declude Virus]