can not unparse code with ' in format_spec #112364
Description
Bug report
Bug description:
The following example shows that it is not possible to unparse a f-string with a ' in the format_spec, but such code can be generated when the f-string is double-quoted.
expected behaviour:
unparse should use different quotes if quotes are part of the format_spec.
This is only a problem in 3.12 and worked in 3.11
import ast code="""f"{something:'}" """ print("original code:",code) tree=ast.parse(code) print("original tree:",ast.dump(tree,indent=2)) new_code=ast.unparse(tree) print("unparsed code:",new_code) ast.parse(new_code)output (Python 3.12.0):
original code: f"{something:'}" original tree: Module( body=[ Expr( value=JoinedStr( values=[ FormattedValue( value=Name(id='something', ctx=Load()), conversion=-1, format_spec=JoinedStr( values=[ Constant(value="'")]))]))], type_ignores=[]) unparsed code: f'{something:'}' Traceback (most recent call last): File "/home/frank/projects/pysource-playground/pysource-codegen/codi.py", line 13, in <module> ast.parse(new_code) File "/home/frank/.pyenv/versions/3.12.0/lib/python3.12/ast.py", line 52, in parse return compile(source, filename, mode, flags, ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "<unknown>", line 1 f'{something:'}' ^ SyntaxError: unterminated string literal (detected at line 1)CPython versions tested on:
3.12
Operating systems tested on:
Linux