gistfile1.txt

Plucky-Badger-2:celeritypy jginsberg$ ipython
Python 2.7.6 (default, Sep  9 2014, 15:04:36) 
Type "copyright", "credits" or "license" for more information.

IPython 3.0.0 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

In [1]: list_of_numbers = range(20)

In [2]: print list_of_numbers
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19]

In [3]: for i in list_of_numbers:
   ...:     print i
   ...:     if i > 12:
   ...:         break
   ...:     
0
1
2
3
4
5
6
7
8
9
10
11
12
13

In [4]: