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Replace is with == for literal or new object comparisons#17

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pixeebot[bot] wants to merge 1 commit intomainfrom
pixeebot/drip-2025-07-25-pixee-python/literal-or-new-object-identity
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Replace is with == for literal or new object comparisons#17
pixeebot[bot] wants to merge 1 commit intomainfrom
pixeebot/drip-2025-07-25-pixee-python/literal-or-new-object-identity

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@pixeebot
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@pixeebot pixeebot bot commented Jul 25, 2025

The is and is not operators only evaluate to True when the expressions on each side have the same id. In other words, a is b is equivalent to id(a) == id(b). With few exceptions, objects and literals have unique identities and thus shouldn't generally be compared by using the is or is not operators.

Our changes look something like this:

def foo(l):
-    return l is [1,2,3]
+    return l == [1,2,3]
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@sonarqubecloud
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Quality Gate Failed Quality Gate failed

Failed conditions
C Reliability Rating on New Code (required ≥ A)

See analysis details on SonarQube Cloud

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pixeebot bot commented Aug 2, 2025

I'm confident in this change, but I'm not a maintainer of this project. Do you see any reason not to merge it?

If this change was not helpful, or you have suggestions for improvements, please let me know!

@pixeebot
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pixeebot bot commented Aug 3, 2025

Just a friendly ping to remind you about this change. If there are concerns about it, we'd love to hear about them!

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pixeebot bot commented Aug 9, 2025

This change may not be a priority right now, so I'll close it. If there was something I could have done better, please let me know!

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@pixeebot pixeebot bot closed this Aug 9, 2025
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