Warning: |
Starting from version 9.0, the default distributed version of Sage is using Python 3. See Python3-Switch for more information. |
Main caveat
range and xrange
In Python range is a function that returns a list.
Toggle line numbers
1 sage-8.9: range(5)
2 [0, 1, 2, 3, 4]
3 sage-8.9: type(range(5))
4 <type 'list'>
In Python 3, range is an object that somehow behave as a list (ie elements can still be acessed with square bracket, it has a length, etc) but it is not a list.
The iterator xrange is no longer valid in Python 3 simply use range instead.