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    Lab 3 Reference: Check out Python Tutor
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# Lab 3 Reference: Check out Python Tutor

[Python Tutor](http://pythontutor.com) is a web tool that visualizes what happens as Python executes each line of code in a program.

Explore following examples with your partner...

<a href="http://pythontutor.com/visualize.html#code=user_name+%3D+raw_input('Enter+a+name%3A+'%29%0Auser_verb+%3D+raw_input('Enter+a+verb%3A+'%29%0Auser_noun+%3D+raw_input('Enter+a+noun%3A+'%29%0A%0Aall_together+%3D+user_name+%2B+'+'+%2B+user_verb+%2B'+'+%2B+user_noun%0Aprint+all_together%0A&mode=display&origin=opt-frontend.js&cumulative=false&heapPrimitives=false&textReferences=false&py=2&rawInputLstJSON=%5B%5D&curInstr=0">Example 1...</a>

<a href="http://www.pythontutor.com/visualize.html#code=user_name+%3D+raw_input('Enter+a+name%3A+'%29%0Auser_verb+%3D+raw_input('Enter+a+verb%3A+'%29%0Auser_noun+%3D+raw_input('Enter+a+noun%3A+'%29%0A%0Adef+song(name,+verb,+noun%29%3A%0A++++'''Prints+a+customized+song'''%0A++++print+''+%23+blank+line%0A++++chorus1+%3D+'Late+night+when+you+need+my+love'%0A++++chorus2+%3D+'That+can+only+mean+one+thing'%0A++++print+name+%2B+'+used+to+'+%2B+verb+%2B+'+me+on+my+'+%2B+noun%0A++++print+chorus1%0A++++print+verb+%2B+'+me+on+my+'+%2B+noun%0A++++print+chorus1%0A++++print+chorus2%0A%0Asong(user_name,+user_verb,+user_noun%29%0A&mode=display&origin=opt-frontend.js&cumulative=false&heapPrimitives=false&textReferences=false&py=2&rawInputLstJSON=%5B%5D&curInstr=0">Example 2...</a>

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