PythonCharmers/python-future

__bool__ = __nonzero__ not detected

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#453 创建于 2019年5月2日

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 (2 评论) (0 反应) (0 负责人)Python (1,172 star) (327 fork)batch import
0.19bugfuturize scripthelp wanted

描述

Code like:

class Foo(object):
    def __nonzero__(self):
        return True
    __bool__ = __nonzero__

results in

from builtins import object
class Foo(object):
    def __bool__(self):
        return True
    __bool__ = __nonzero__

and therefore raises in Python3:

  File "test.py", line 2, in <module>
    class Foo(object):
  File "test.py", line 5, in Foo
    __bool__ = __nonzero__
NameError: name '__nonzero__' is not defined

贡献者指南

技术栈
python
领域
developer experiencetooling
议题类型
bug
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-3 hours
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
clear
前置要求
Python 2 vs 3python future librarydunder methods
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
50
研究方向
Examine the futurize tool's translation logic for special methods, likely in the 'libfuturize' or 'future' source code. The bug occurs when nonzero is defined and bool is assigned as a class attribute; the tool incorrectly translates both. The fix should remove the assignment and convert nonzero to bool as the sole method. Review existing comments on the issue for additional context.