Traceback debugging

Because the error is traced back from the initial call to the latest call, the error message is called traceback message , or simply traceback .

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I can’t understand what exactly this error means

Not sure what your question is…

If you are asking about what TypeError means, then here it is:

TypeError is thrown when an operation or function is applied to an object of an inappropriate type.

On the other hand you have marked Traceback (most recent call last) with yellow line, but that says exactly this - most recently called something is shown last. This last part is missing from your screenshot.

Please, clarify.

yes I got it , many thanks !!