Python String Conversion 101: Why Every Class Needs a “repr”

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How and why to implement Python “to string” conversion in your own classes using Python’s “repr” and “str” mechanisms and associated coding conventions.

When you define a custom class in Python and then try to print one of its instances to the console (or inspect it in an interpreter session), you get a relatively unsatisfying result.

The default “to string” conversion behavior is basic and lacks detail:

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