t; sage: x[0] = 'something else'
> sage: y # since x and y are the same object, they have the same contents
> ['something else']
> sage: x = ['something else again'] # now x references a new object,
> sage: y# so y doesn't cha
Code for the worksheet attached below.
There must surely be a simple answer to this problem, but I have not
been able to figure it out. I loop through i,j print the list
[i,j], and append the list to pts. However, once appended to points
something goes wrong, and all that points sees are the cons
