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Debugging and Printing

Debugging and Printing. George Mason University. Today’s topics. Review of Chapter 3: Printing and Debugging Go over examples and questions debugging in Python. Debugging and printing review. How do we trace through code by hand?

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Debugging and Printing

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  1. Debugging and Printing George Mason University

  2. Today’s topics • Review of Chapter 3: Printing and Debugging • Go over examples and questions • debugging in Python

  3. Debugging and printing review • How do we trace through code by hand? • What is a print statement? How is it different than a return statement? • What is a function? How do we call one?

  4. Let’s go over the exercises

  5. Printing and Functions in python • printis a keyword that prints out the expression that follows it • str is actually a function that we call with an argument • Any guesses what’s going on in the last and first line? (we’ll cover this in the future)

  6. Debugging in python • You can always use print statements to debug your code • There are other tools that can save time if you just want to trace through the code once, not by hand: • http://pythontutor.com/visualize.html#mode=edit • in-class demo

  7. Questions?

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