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描述
Summary
trailing-comma-on-bare-tuple (COM818) is documented as:
Checks for the presence of trailing commas on bare (i.e., unparenthesized) tuples.
but it only checks for a comma before a statement-final newline. The documentation should be more precise as to which bare tuples are in scope for this rule.
Bare tuples in subscripts are subject to incorrectly-parenthesized-tuple-in-subscript (RUF031). They are out of scope for COM818.
COM818 does not check bare tuples in yield expressions. Maybe it should, or maybe this should be called out as another exception in the documentation.
def f(x): x.append((yield x[-1],))
COM818 should also check for a comma before a semicolon, as in this bare tuple:
print("Hello,"),;
Version
ruff 0.12.0 (87f0feb21 2025-06-17)