[issue31550] Inconsistent error message for TypeError with subscripting
Raymond Hettinger
report at bugs.python.org
Mon Mar 19 15:51:36 EDT 2018
Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:
I would like to leave this as-is. Consistency between error message wording is one of our least important considerations. The __getitem__ message is somewhat useful -- it helps learners know which magic method is being called and what they would need to add to a class to make it work. This was the typical wording for old-style classes. For example, calling len() on an old-style class without __len__ gave this message, "AttributeError: A instance has no attribute '__len__'".
In addition, we are getting very close to end-of-life for Python2.7. Accordingly, any changes at this point should be limited to things that really matter. It will be too easy to introduce a new problem that we won't have an opportunity to fix later.
I recommend closing this and shifting attention to things that matter.
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assignee: -> rhettinger
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<https://bugs.python.org/issue31550>
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