Python Tutor (pythontutor.com)

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https://pythontutor.com/ helps you do programming homework assignments in Python, Java, C, C++, and JavaScript. It contains a unique step-by-step visual debugger and AI tutor to help you understand and debug code.

what does assignment with = mean for numbers? [pythontutor.com]

three object nesting options [pythontutor.com]

why does equals look different for lists and numbers? [pythontutor.com]

what happens when you try to append a Python list to itself? [pythontutor.com]

how equals works on Python lists [pythontutor.com]

moving and hiding objects [pythontutor.com]