On Thu, Oct 21, 2010 at 7:25 PM, Joe Shoulak <joepshou...@yahoo.com> wrote: > I'm trying to make a sports simulation program and so far everything has > worked until I try entering: > > Score1 = (Team1Off + Team2Def)/2 > > I get the error: > > TypeError: unsupported operand type(s) for /: 'str' and 'int' > > Can someone please explain to me what this means, why it doesn't work and > what I can do to make it work?
Team1Off and Team2Def are strings (i.e. text); Python's string type is called "str". Adding two strings concatenates them; e.g. "abc" + "def" == "abcdef". "int" is the name of Python's integer type. 2 is the integer in question. You're trying to divide a string (the concatenation of Team1Off and Team2Def) by an integer (2), which is nonsensical (What would it mean to divide "The quick brown fox" by the number 2?); hence, Python raises an error (TypeError) to inform you of this. You need to convert Team1Off and Team2Def to numbers instead of strings so you can do calculations involving them. This can be done by writing: Team1Off = int(Team1Off) assuming Team1Off is a string representing a decimal integer; e.g. "12345". If it instead represents a floating-point number (i.e. has a decimal point; e.g. "1.23"), substitute "float" for "int". You will of course need to also convert Team2Def using the same technique. Note that ValueError will be raised if the string doesn't represent a number. You may also want to add the following to the start of your code so that the results of divisions are what you expect: from __future__ import division If you haven't already, you should read the Python tutorial: http://docs.python.org/tutorial/ Cheers, Chris -- http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
