10000 Python3 erroneously calls r'\' a syntax error · Issue #103704 · python/cpython · GitHub
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Python3 erroneously calls r'\' a syntax error #103704

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greg1lutz opened this issue Apr 23, 2023 · 3 comments
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Python3 erroneously calls r'\' a syntax error #103704

greg1lutz opened this issue Apr 23, 2023 · 3 comments

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@greg1lutz
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greg1lutz commented Apr 23, 2023 •
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The Python 3.11.3 interpreter, upon seeing the expression
r'\'
emits the message
SyntaxError: unterminated string literal
@hauntsaninja
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hauntsaninja commented Apr 23, 2023 •
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Thanks, but this isn't a bug.

This is documented at this FAQ: https://docs.python.org/3/faq/programming.html#can-i-end-a-raw-string-with-an-odd-number-of-backslashes

It's also mentioned at https://docs.python.org/3/reference/lexical_analysis.html#string-and-bytes-literals

(we recently improved the docs for this in #94768 )

@hauntsaninja hauntsaninja closed this as not planned Won't fix, can't repro, duplicate, stale Apr 23, 2023
@terryjreedy
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@greg1lutz Please ask whether behaviors are bugs on the discuss help channel.

@hauntsaninja
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hauntsaninja commented Apr 24, 2023 •
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Oh one more note is that I'd opened #100446 to explore ways to improve the error message

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