gh-89682: [doc] reword docstring of __contains__ to clarify that it returns a bool#29043
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…s I was confused by help(list.__contains__)
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This PR is stale because it has been open for 30 days with no activity. |
iritkatriel
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iritkatriel
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We'll need a news file for this. It's minor, but it touches a builtin. |
iritkatriel
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this suggested by iritkatriel Co-authored-by: Irit Katriel <1055913+iritkatriel@users.noreply.github.com>
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Most changes to Python require a NEWS entry. Please add it using the blurb_it web app or the blurb command-line tool. |
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Most changes to Python require a NEWS entry. Please add it using the blurb_it web app or the blurb command-line tool. |
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Thanks, I'll merge once CI completes. |
6 participants
I was looking to implement a "custom object" to represent intervals of numbers
e.g.
if x in interval(2,4)will beTrue if (x >= 2) and (x < 4).I looked up
help(list.__contains__)and it says "Return key in self" which I interpreted as returning the actual key, not a boolean. A moment of confusion ensured and I tested[2,3].__contains__(2)to check that return value of__contains__is indeed boolean.The docstring change suggestion makes the return type of
__contains__clearer.A type hint for old school people who
?methods in jupyter notebooks ;)