Re: a=b change b a==b true??

All, It works great now. Thank you for all of your incredibly quick replies. Rob -- http://mail.python.org/mailman/listinfo/python-list

a=b change b a==b true??

I do not have a clue what is happening in the code below. >>> a=[[2,4],[9,3]] >>> b=a >>> [map(list.sort,b)] [[None, None]] >>> b [[2, 4], [3, 9]] >>> a [[2, 4], [3, 9]] I want to make a copy of matrix a and then make changes to the matrices separately. I assume that I am missing a fundamental c