On 18 Dec 2005 23:18:48 -0800, Paul Rubin <http://[EMAIL PROTECTED]> wrote:
>[EMAIL PROTECTED] writes: >> I want to calculate f(0) + f(1) + ...+ f(100) over some function f >> which I can change. So I would like to create a function taking f as >> argument giving back the sum. How do you do that in Python? > >You can just pass f as an argument. The following is not the most >concise or general way, it just shows how you can pass a function. > > def square(x): > return x**2 > > def sum100(f): # f(0)+f(1)+...+f(100) > s = 0 > for i in xrange(101): > s += f(i) > return s > > print sum100(square) # pass square as an argument or >>> def square(x): return x*x ... >>> from itertools import imap >>> sum(imap(square, xrange(101))) 338350 which seems to agree with >>> def sum100(f): ... s = 0 ... for i in xrange(101): ... s += f(i) ... return s ... >>> sum100(square) 338350 or if the OP actually wants the specific function, >>> def sum100a(f): return sum(imap(f, xrange(101))) ... >>> sum100a(square) 338350 Regards, Bengt Richter -- http://mail.python.org/mailman/listinfo/python-list
