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tests/cpydiff: Update CPy diff for assign expr in nested comprehensions.

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Since 7c1584aef1 MicroPython matches CPython in most cases, aside from
nested comprehensions.

This work was funded through GitHub Sponsors.

Signed-off-by: Angus Gratton <angus@redyak.com.au>
This commit is contained in:
Angus Gratton 2025-04-01 12:09:41 +11:00 committed by Damien George
parent e34412f0f4
commit 57f1e60dd0
1 changed files with 4 additions and 4 deletions
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8
tests/cpydiff/syntax_assign_expr.py
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@ -1,8 +1,8 @@
"""
categories: Syntax,Operators
description: MicroPython allows using := to assign to the variable of a comprehension, CPython raises a SyntaxError.
cause: MicroPython is optimised for code size and doesn't check this case.
workaround: Do not rely on this behaviour if writing CPython compatible code.
description: MicroPython allows := to assign to the iteration variable in nested comprehensions, CPython does not.
cause: MicroPython is optimised for code size. Although it is a syntax error to assign to the iteration variable in a standard comprehension (same as CPython), it doesn't check if an inner nested comprehension assigns to the iteration variable of the outer comprehension.
workaround: Do not use := to assign to the iteration variable of a comprehension.
"""
print([i := -1 for i in range(4)])
print([[(j := i) for i in range(2)] for j in range(2)])