[issue44069] pathlib.Path.glob's generator is not a real generator
Terry J. Reedy
report at bugs.python.org
Fri May 21 12:32:39 EDT 2021
Terry J. Reedy <tjreedy at udel.edu> added the comment:
I agree that from the outside is seems slightly bizarre to make an internal list to implement a function documented as returning an iterator. However, list(scandir) was added by Serhiy in #26032 with the comment that it made globbing 1.5-4 times faster. This is, of course, if one runs the iterator to completion, as is the normal use.
For your presented use case, I suggest something like the following:
next(f for f in scandir(path) if os.path.splitext(f)[1] == '.txt')
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nosy: +terry.reedy
versions: -Python 3.10, Python 3.6, Python 3.7, Python 3.8, Python 3.9
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