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ast.parse(..., mode='single') parses of multiple statements which are then not unparsed #129598
Description
Bug report
Bug description:
$ ./python
Python 3.14.0a4+ (heads/test:d906bde250, Feb 2 2025, 11:08:38) [GCC 11.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import ast
>>> a = ast.parse('i = 1; j = 2', mode='single')
>>> print(ast.dump(a, indent=2))
Interactive(
body=[
Assign(
targets=[
Name(id='i', ctx=Store())],
value=Constant(value=1)),
Assign(
targets=[
Name(id='j', ctx=Store())],
value=Constant(value=2))])
>>> ast.unparse(a)
'j = 2'My guess the ast.parse() should probably error?
CPython versions tested on:
3.14, 3.12, 3.13, 3.11, 3.10
Operating systems tested on:
Linux
Activity
tomasr8 commentedon Feb 3, 2025
mode='single'is for Interactive input which always returnsast.Interactive.i = 1; j = 2is a validinteractive_input.It looks like we are missing a specialized
visit_Interactivein the_Unparservisitor:cpython/Lib/ast.py
Lines 666 to 669 in 808071b
Would you like to fix this? Otherwise I can send a fix later
tom-pytel commentedon Feb 3, 2025
Sure, will send something up later.
pythongh-129598: allow multi stmts for ast single with ';'
[-]ast.parse(..., mode='single') parses of multiple statements which are then not unparsed[/-][+]`ast.parse(..., mode='single')` parses of multiple statements which are then not unparsed[/+]gh-129598: ast: allow multi stmts for ast single with ';' (#129620)