On Jul 25, 8:46 am, beginner <[EMAIL PROTECTED]> wrote: > On Jul 25, 10:19 am, Stargaming <[EMAIL PROTECTED]> wrote: > > > > > 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, 4.7.4http://www.python.org/doc/ > > current/tut/node6.html#SECTION006740000000000000000 > > > > Thanks, > > > cg > > > HTH, > > Stargaming > > Hi Stargaming, > > I know the * operator. However, a 'partial unpack' does not seem to > work. > > def g(): > return (1,2) > > def f(a,b,c): > return a+b+c > > f(*g(),10) will return an error. > > Do you know how to get that to work?
You can use the "partial" method from functools: import functools sum_of_three = functools.partial(f, *g())(10) -- Hope this helps, Steven -- http://mail.python.org/mailman/listinfo/python-list
