On Sun, Mar 8, 2009 at 12:39 AM, sphennings W. <[email protected]> wrote:
> When I enter the following code into IDLE do both lists have the same > value? > How would I manipulate both lists separately? > > >>> List1=[1,2,3] > >>> List2=List1 > >>> List2.reverse() > >>> print(List2) > [3, 2, 1] > >>> print(List1) > [3, 2, 1] > >>> List2.append(0) > >>> print(List2) > [3, 2, 1, 0] > >>> print(List1) > [3, 2, 1, 0] When you create an object and assign it to a variable, the variable only refers to the object and does not represent the object itself. If you want to make a copy of a list or such kinds of sequences , then you have to use the slicing operation to make a copy. If you just assign the variable name to another name, both of them will refer to the same object. List2=List1[ : ] Kapil Dua Mobile: +919711311052
_______________________________________________ Tutor maillist - [email protected] http://mail.python.org/mailman/listinfo/tutor
