It is usually clearer to explicitely return values that are changed by a function and re-assign it to the same variable,
x=something1 a = something2 def f1(s,t): # do something with t, # do something to s return s a = f1(a,x) Be aware however that you can wrap 'a' in a list for the same effect, (but it is not as easy to read). x=something1 aa = [something2] def f2(ss,t): s= ss[0] # do something with t, # do something to s ss[0]=s f2(aa,x) a=aa[0] -- Pad. -- http://mail.python.org/mailman/listinfo/python-list
