[issue45268] use multiple "in" in one expression?
Dennis Sweeney
report at bugs.python.org
Thu Sep 23 02:19:24 EDT 2021
Dennis Sweeney <sweeney.dennis650 at gmail.com> added the comment:
This is the expected behavior, documented here: https://docs.python.org/3/reference/expressions.html#comparisons
That page says:
* The comparison operators are "<" | ">" | "==" | ">=" | "<=" | "!=" | "is" ["not"] | ["not"] "in"
* "Comparisons can be chained arbitrarily"
* "Note that a op1 b op2 c doesn’t imply any kind of comparison between a and c, so that, e.g., x < y > z is perfectly legal (though perhaps not pretty)."
So I'll close this for now.
I think it would be hard to change this behavior without introducing a needless backwards-incompatibility, but if you have a proposal, you could bring it up on the Python-Ideas mailing list.
----------
nosy: +Dennis Sweeney
resolution: -> not a bug
stage: -> resolved
status: open -> closed
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