__all__ 放在 Python 文件的什么地方？
Where to place __all__ in a Python file?
我想知道 __all__ 在 Python 文件中的标准位置是什么？
我的假设就在导入语句的正下方。但是，我无法在任何地方明确地 stated/asked 找到它。那么，一般来说，一个地方应该放在哪里__all__?
它会放在下面的示例文件中的什么地方？
#!/usr/bin/env python3
"""Where to put __all__."""
from time import time
# I think it should go here: __all__ = ["Hello"]
SOME_GLOBAL = 0.0
class Hello:
def __init__(self):
pass
if __name__ == "__main__":
pass
提前致谢！
根据 PEP 8:
Module level "dunders" (i.e. names with two leading and two trailing underscores) such as __all__, __author__, __version__, etc. should be placed after the module docstring but before any import statements except from __future__ imports.
因此，如果您严格遵守 PEP 8，那么您就很接近了。实际上，不是严格遵守。 Python "included batteries" 模块的 ton 在导入后定义 __all__，所以你的方法非常好。
如前所述here：
Module level "dunders" (i.e. names with two leading and two trailing underscores) such as __all__, __author__, __version__, etc. should be placed after the module docstring but before any import statements except from __future__ imports. Python mandates that future-imports must appear in the module before any other code except docstrings:
我想知道 __all__ 在 Python 文件中的标准位置是什么？
我的假设就在导入语句的正下方。但是，我无法在任何地方明确地 stated/asked 找到它。那么，一般来说，一个地方应该放在哪里__all__?
它会放在下面的示例文件中的什么地方？
#!/usr/bin/env python3
"""Where to put __all__."""
from time import time
# I think it should go here: __all__ = ["Hello"]
SOME_GLOBAL = 0.0
class Hello:
def __init__(self):
pass
if __name__ == "__main__":
pass
提前致谢！
根据 PEP 8:
Module level "dunders" (i.e. names with two leading and two trailing underscores) such as
__all__,__author__,__version__, etc. should be placed after the module docstring but before any import statements except from__future__imports.
因此，如果您严格遵守 PEP 8，那么您就很接近了。实际上，不是严格遵守。 Python "included batteries" 模块的 ton 在导入后定义 __all__，所以你的方法非常好。
如前所述here：
Module level "dunders" (i.e. names with two leading and two trailing underscores) such as
__all__,__author__,__version__, etc. should be placed after the module docstring but before any import statements except from__future__imports. Python mandates that future-imports must appear in the module before any other code except docstrings: