[issue40202] Misleading grammatically of ValueError Message?

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

It was discussed in issue39816.

I do not think that calling len() and ignoring any exception is a good idea.

1. This may silence some exceptions (errors in the __len__ implementation, MemoryError, RecursionError, KeyboardInterrupt) which should not be silenced.

2. __len__() may have side effect.

3. __next__() may affects the result of __len__() (for example __next__() pops a value of the queue, and __len__() returns the size of the queue), so using the result of __len__() after calling __next__() may be misleading.

Since the original report was about 2.7 which is no longer maintained, I propose to close this issue as outdated.

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nosy: +serhiy.storchaka

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<https://bugs.python.org/issue40202>
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