New submission from Mital Ashok:
Take this format python code:
import unicodedata
c = chr(0x012345)
To print that character as a string literal, you would expect to do:
print(f"'\\N{{{unicodedata.name(c)}}}'")
Which should print a literal quote (`'`), a backwards slash (`\\` -> `\`), an
`N`, and the two `{{` should escape and print `{`, followed by the f-expression
`unicodedata.name(c)`, then the `}}` would print one `}`, and then another
literal quote (`'`).
However, this raises a `SyntaxError: f-string: single '}' is not allowed`. The
way to do this without a syntax error is like so:
print(f"'\\N{{unicodedata.name(c)}}}'")
Which prints the expected:
'\N{CUNEIFORM SIGN URU TIMES KI}'
The shortest way to reproduce this is:
f'\\N{'
Which works, and:
f'\\N{{'
which raises an error, even though the first one should raise an error
(`SyntaxError: f-string: expecting '}'`).
----------
messages: 298563
nosy: Mital Ashok
priority: normal
severity: normal
status: open
title: \\N in f-string causes next { to be literal if not escaped
versions: Python 3.6, Python 3.7
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Python tracker <[email protected]>
<http://bugs.python.org/issue30955>
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