On Wed, 25 Jul 2007 14:50:18 +0000, beginner wrote: > Hi, > > I am wondering how do I 'flatten' a list or a tuple? For example, I'd > like to transform[1, 2, (3,4)] or [1,2,[3,4]] to [1,2,3,4].
A recursive function, always yielding the first element of the list, could do the job. See the ASPN Python Cookbook for a few implementations. http://aspn.activestate.com/ASPN/search? query=flatten§ion=PYTHONCKBK&type=Subsection > Another question is how do I pass a tuple or list of all the aurgements > of a function to the function. For example, I have all the arguments of > a function in a tuple a=(1,2,3). Then I want to pass each item in the > tuple to a function f so that I make a function call f(1,2,3). In perl > it is a given, but in python, I haven't figured out a way to do it. > (Maybe apply? but it is deprecated?) >>> def foo(a, b, c): print a, b, c ... >>> t = (1, 2, 3) >>> foo(*t) 1 2 3 Have a look at the official tutorial, 4.7.4 http://www.python.org/doc/ current/tut/node6.html#SECTION006740000000000000000 > Thanks, > cg HTH, Stargaming -- http://mail.python.org/mailman/listinfo/python-list
