AttributeError on `with super()`
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interpreter-core
type-feature
- 主要语言
- Python
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描述
Bug report
Bug description:
Writing with super() raises an AttributeError. I ran into this implementing context managers inspired by contextlib.contextmnager but which had extra functionality. I can see no reason why with super() should be disallowed, and in fact, super().__enter__() and super().__exit__() work just fine.
Attempting to use an ExitStack as a work around was unsuccessful.
import sys
from contextlib import ExitStack
class Base:
def __enter__(self):
print("Entering base context manager")
def __exit__(self, type, value, traceback):
print("Exiting base context manager")
def __derived_enter__(self):
self.context = self.contextlib_style_context()
next(self.context)
return self.context
def __derived_exit__(self, type, value, traceback):
try:
next(self.context)
except StopIteration:
pass
class DerivedUsingEnterExit(Base):
def contextlib_style_context(self):
print("Entering contextlib style context manager")
super().__enter__()
try:
yield
finally:
super().__exit__(*sys.exc_info())
print("Exiting contextlib style context manager")
__enter__ = __derived_enter__
__exit__ = __derived_exit__
class DerivedUsingWith(Base):
def contextlib_style_context(self):
print("Entering contextlib style context manager")
with super():
yield
print("Exiting contextlib style context manager")
__enter__ = __derived_enter__
__exit__ = __derived_exit__
class DerivedUsingExitStack(Base):
def contextlib_style_context(self):
print("Entering contextlib style context manager")
with ExitStack() as stack:
stack.enter_context(super())
yield
print("Exiting contextlib style context manager")
__enter__ = __derived_enter__
__exit__ = __derived_exit__
# Runs successfully
with DerivedUsingEnterExit() as d:
pass
# Raises AttributeError
with DerivedUsingWith() as d:
pass
# Raises AttributeError
with DerivedUsingExitStack() as d:
pass
CPython versions tested on:
3.13, 3.12
Operating systems tested on:
Windows
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调研方向
先在 CPython 3.13 或 3.12 上复现所提供的 DerivedUsingWith 和 DerivedUsingExitStack 示例,然后跟踪涉及的 super() 和上下文管理器入口点。将它们与正常工作的 super().enter() 和 super().exit() 情况进行比较;完成意味着预期行为已确定,并且报告的 AttributeError 已由回归测试覆盖。
由索引模型根据 Issue 内容生成。
评估
- 技术栈
- python
- 领域
- compilers
- Issue 类型
- 缺陷
- 难度
- 4/5
- 预计耗时
- 3-5 天
- 活跃度
- 停滞
- 描述清晰度
- 基本清楚
- 新手友好度
- 35/100