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[pyflakes] Improve invalid-print-syntax documentation (#11171)

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This syntax wasn't "deprecated" in Python 3; it was removed.

I started looking at this rule because I was curious how Ruff could even
detect this without a Python 2 parser. Then I realized that
"print >> f, x" is actually valid Python 3 syntax: it creates a tuple
containing a right-shifted version of the print function.
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Jelle Zijlstra 2024-04-27 04:54:04 -07:00 • committed by GitHub
parent 61c97a037c
commit 59b73fabc1
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crates/ruff_linter/src/rules/pyflakes/rules/invalid_print_syntax.rs
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@ -10,8 +10,9 @@ use crate::checkers::ast::Checker;
/// ///
/// ## Why is this bad? /// ## Why is this bad?
/// In Python 2, the `print` statement can be used with the `>>` syntax to /// In Python 2, the `print` statement can be used with the `>>` syntax to
/// print to a file-like object. This `print >> sys.stderr` syntax is /// print to a file-like object. This `print >> sys.stderr` syntax no
/// deprecated in Python 3. /// longer exists in Python 3, where `print` is only a function, not a
/// statement.
/// ///
/// Instead, use the `file` keyword argument to the `print` function, the /// Instead, use the `file` keyword argument to the `print` function, the
/// `sys.stderr.write` function, or the `logging` module. /// `sys.stderr.write` function, or the `logging` module.