Hi,

Python is optimized for performance. Formatting an error message has a
cost on performances.

I suggest you to teach your student to use the REPL and use a custom
exception handler: sys.excepthook:
https://docs.python.org/2/library/sys.html#sys.excepthook

Using a custom exception handler, you can run expensive functions,
like the feature: "suggest len when length is used".

The problem is then when students have to use a Python without the
custom exception handler.

Victor
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