[issue47202] Feature request: Throw an error when making impossible evaluation against an empty list

[Eric V. Smith]

Eric V. Smith <eric at trueblade.com> added the comment:

As Jelle says, this can't be a runtime Exception.

At best mypy or a linter could make iterating over an known empty list (like a literal []) a warning, not an error as suggested by the OP. I sometimes "comment out" loops by doing something like:

for i in []: # long_list_returning_function():
    # lots of code here

I do this just to avoid re-indenting everything if I want to skip the loop during development.

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nosy: +eric.smith

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