Thank you, Chris! Sent from my iPhone
On Apr 7, 2012, at 3:24 PM, Chris Rebert <c...@rebertia.com> wrote: > On Sat, Apr 7, 2012 at 2:15 PM, KRB <alaga...@gmail.com> wrote: >> Hi there, >> >> I would like to be able to pass a list of variables to a procedure, and have >> the output assigned to them. > > You cannot pass a variable itself to a function; you can only pass a > variable's value. Which is to say that Python doesn't use > pass-by-reference. > Without using black magic, a Python function cannot rebind variables > in its caller's scope. Mutable values can be mutated however. > Details: http://effbot.org/zone/call-by-object.htm > >> For instance: >> >> x=0 >> y=0 >> z=0 >> >> vars =[x,y,z] >> parameters=[1,2,3] >> >> for i in range(1,len(vars)): >> *** somefunction that takes the parameter "1", does a computation and >> assigns the output to "x", and so on and so forth. >> >> Such that later in the program I can >> print x,y,z >> >> I hope that makes sense, otherwise I have to do: >> x=somefunction(1) >> y=somefunction(2) >> z=somefunction(3) >> etc etc > > Just use sequence (un)packing: > > def somefunction(*parameters): > # one would normally use a list comprehension here; > # for simplicity, I'm not > results = [] > for parameter in parameters: > result = do_some_calculation(parameter) > results.append(result) > return results > > #…later... > x, y, z = somefunction(1, 2, 3) > > > Relevant docs: > http://docs.python.org/tutorial/datastructures.html#tuples-and-sequences > http://docs.python.org/tutorial/controlflow.html#tut-unpacking-arguments > > Cheers, > Chris -- http://mail.python.org/mailman/listinfo/python-list
