Newer version: try the Python visualizer on pythontutor.com, which runs newer Python versions, supports more data structures, advanced language features, and Java, C, C++, and JavaScript.

Write your Python 3 code here:

Execute code using Python 3.3 Python 2.7 , hide frames of exited functions show frames of exited functions , inline primitives and nested objects render all objects on the heap , hide environment parent pointers show environment parent pointers , draw references using arrows use text labels for references , and show everything show only outputs .

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Original tool © 2010-2013 Philip Guo. This version by CS Circles.