Ensure these are always lists

So that they print nicely, as we show. No, this isn't ideal Python,
but I'm trying to be somewhat mechanistic in this modernisation.
I'm not going to rewrite this section now.

Author: PeterJCLaw

tutorials/python.md

@@ -475,7 +475,7 @@ Combined with the `range` function, which returns a list of numbers in a certain
 
 ~~~~~ python
 my_list = [42, "BOOMERANG!!!", [0, 3]]
-print range(len(my_list))
+print list(range(len(my_list)))
 ~~~~~
 
 Output:
@@ -487,9 +487,9 @@ Output:
 The `range` function can also take multiple parameters:
 
 ~~~~~ python
-print range(5)            # numbers from 0 to 4.
-print range(2, 5)         # numbers from 2 to 4.
-print range(1, 10, 2)     # odd numbers from 1 to 10
+print list(range(5))            # numbers from 0 to 4.
+print list(range(2, 5))         # numbers from 2 to 4.
+print list(range(1, 10, 2))     # odd numbers from 1 to 10
 ~~~~~
 
 Output: