About Python Tutor

Python Tutor can visually display the object reference relationship.

URL is http://www.pythontutor.com/visualize.html

1) Edit code.

2) Run, can see the following interface.

This tool is cool and we can clearly see the reference relationship between object. When it is difficult to understand a certain point of knowledge, you can tap code to perform the observation.

Points of knowledge that can help:

1. The object that the reference points to is mutable or immutable.

For example, why don't we use a mutable list as a function parameter.

2. Scooping of variables. That is, scope.

Local variables, closure variables, global variables, built-in variables.

About Python Tutor