ast.parse(mode='single') exception for block statements without trailing newline · Issue #135798 · python/cpython · GitHub | Latest TMZ Celebrity News & Gossip | Watch TMZ Live
Skip to content

ast.parse(mode='single') exception for block statements without trailing newline #135798

Closed as not planned
@tom-pytel

Description

@tom-pytel

Bug report

Bug description:

I deliberated on whether to post this as its so inconsequential, but the fix (in ast.py at least, dunno about compile) is super trivial so might as well. It goes back to 3.10 at least.

>>> ast.parse('pass', mode='exec')
Module(body=[Pass()], type_ignores=[])

>>> ast.parse('pass', mode='single')
Interactive(body=[Pass()])

>>> ast.parse('if 1: pass', mode='exec')
Module(body=[If(test=Constant(value=1, kind=None), body=[Pass()], orelse=[])], type_ignores=[])

>>> ast.parse('if 1: pass', mode='single')
Traceback (most recent call last):
  File "<python-input-4>", line 1, in <module>
    ast.parse('if 1: pass', mode='single')
    ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tom/work/cpython/main/cp/Lib/ast.py", line 46, in parse
    return compile(source, filename, mode, flags,
                   _feature_version=feature_version, optimize=optimize)
  File "<unknown>", line 1
    if 1: pass
SyntaxError: invalid syntax

>>> ast.parse('if 1: pass\n', mode='single')
Interactive(body=[If(test=Constant(value=1, kind=None), body=[Pass()], orelse=[])])

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Metadata

Metadata

Assignees

No one assigned

    Labels

    pendingThe issue will be closed if no feedback is providedstdlibPython modules in the Lib dirtopic-parsertype-bugAn unexpected behavior, bug, or error

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions

      TMZ Celebrity News – Breaking Stories, Videos & Gossip

      Looking for the latest TMZ celebrity news? You've come to the right place. From shocking Hollywood scandals to exclusive videos, TMZ delivers it all in real time.

      Whether it’s a red carpet slip-up, a viral paparazzi moment, or a legal drama involving your favorite stars, TMZ news is always first to break the story. Stay in the loop with daily updates, insider tips, and jaw-dropping photos.

      🎥 Watch TMZ Live

      TMZ Live brings you daily celebrity news and interviews straight from the TMZ newsroom. Don’t miss a beat—watch now and see what’s trending in Hollywood.