> > > "Write a program that takes as its first argument one of the words > > > 'sum,' 'product,' 'mean,' or 'sqrt' and for further arguments a > > > series of numbers. The program applies the appropriate function to > > > the series." > > > > > My solution so far is this: > > > > >http://dpaste.com/13469/ > > > > > I would really like some feedback. Is this a good solution? is it > > > efficient? robust? what could be improved? any not looking for a > > > revised solution, hints on what to improve are also very welcome. > > > > Don't use `eval()` if it is not absolutely necessary. Especially if the > > input comes from a user it's a security hole. `float()` is the function > > to use here. > > > > `mean()` does not work as you try to divide a list by a number. > > > > Thanks for the feedback. I have posted a revised version here (http:// > dpaste.com/13474/) where mean works. The reason I use eval is I want > it to work for complex numbers too, but I guess i could check for the > presence of a "j" in the arguments instead.
Hi, if I invoke your program without arguments an uncaught exception is raised. Wouldn't it be better to inform the user that an argument is expected? See http://docs.python.org/tut/node10.html -- http://mail.python.org/mailman/listinfo/python-list
