[issue34312] Allow str.endswith and str.startswith to accept an iterable
Raymond Hettinger
report at bugs.python.org
Wed Aug 1 22:54:24 EDT 2018
Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:
ISTM that this would encourage silently inefficient coding patterns like:
url.endswith({'.html', '.txt', '.php'})
# The set object gets rebuilt on every call
# and a new set iterator object gets built on every call.
# Looping over the contents uses the slower iterator protocol
# rather than the existing superfast PyTuple_GET_SIZE() and
# PyTuple_GET_ITEM() macros which are entirely in-lined.
Do we have any known use cases or user requests where the existing API doesn't suffice?
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nosy: +rhettinger
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<https://bugs.python.org/issue34312>
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