Closed
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