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bpo-43017: Improve error message for unparenthesised tuples in comprehensions (GH24314)

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Pablo Galindo 2021-01-31 22:52:56 +00:00 • committed by GitHub
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15
Lib/test/test_syntax.py
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@ -235,6 +235,21 @@ SyntaxError: invalid syntax
Traceback (most recent call last):
SyntaxError: invalid syntax
Comprehensions creating tuples without parentheses
should produce a specialized error message:
>>> [x,y for x,y in range(100)]
Traceback (most recent call last):
SyntaxError: did you forget parentheses around the comprehension target?
>>> {x,y for x,y in range(100)}
Traceback (most recent call last):
SyntaxError: did you forget parentheses around the comprehension target?
>>> {x,y: None for x,y in range(100)}
Traceback (most recent call last):
SyntaxError: did you forget parentheses around the comprehension target?
From compiler_complex_args():
>>> def f(None=1):