http://www.pythontutor.com/visualize.html# http://www.pythontutor.com/visualize.html# this is one of my favorite tools for python, lets you iterate through eve

http://www.pythontutor.com/visualize.html# http://www.pythontutor.com/visualize.html# this is one of my favorite tools for python, lets you iterate through every step in your program