python - .pyc 文件甚至在未导入时就已创建

Question

我有 2 个 Python 文件，名为 numbers.py 和 numpyBasicOps.py。 numbers.py 是一个简单的 Python 文件，没有导入任何模块。 numpyBasicOps.py 导入 numpy 库。

每当我运行 numpyBasicOps.py 时，首先显示 numbers.py 的输出，然后是一些与 numpy 模块相关的错误:

Traceback (most recent call last):
  File "./numpyBasicOps.py", line 3, in <module>
    import numpy as np
  File "/Library/Python/2.7/site-packages/numpy-1.11.2rc1-py2.7-macosx-10.11-intel.egg/numpy/__init__.py", line 142, in <module>
    from . import add_newdocs
  File "/Library/Python/2.7/site-packages/numpy-1.11.2rc1-py2.7-macosx-10.11-intel.egg/numpy/add_newdocs.py", line 13, in <module>
    from numpy.lib import add_newdoc
  File "/Library/Python/2.7/site-packages/numpy-1.11.2rc1-py2.7-macosx-10.11-intel.egg/numpy/lib/__init__.py", line 8, in <module>
    from .type_check import *
  File "/Library/Python/2.7/site-packages/numpy-1.11.2rc1-py2.7-macosx-10.11-intel.egg/numpy/lib/type_check.py", line 11, in <module>
    import numpy.core.numeric as _nx
  File "/Library/Python/2.7/site-packages/numpy-1.11.2rc1-py2.7-macosx-10.11-intel.egg/numpy/core/__init__.py", line 22, in <module>
    from . import _internal  # for freeze programs
  File "/Library/Python/2.7/site-packages/numpy-1.11.2rc1-py2.7-macosx-10.11-intel.egg/numpy/core/_internal.py", line 15, in <module>
    from .numerictypes import object_
  File "/Library/Python/2.7/site-packages/numpy-1.11.2rc1-py2.7-macosx-10.11-intel.egg/numpy/core/numerictypes.py", line 962, in <module>
    _register_types()
  File "/Library/Python/2.7/site-packages/numpy-1.11.2rc1-py2.7-macosx-10.11-intel.egg/numpy/core/numerictypes.py", line 958, in _register_types
    numbers.Integral.register(integer)
AttributeError: 'module' object has no attribute 'Integral'

另外，我看到正在生成 numbers.py 的 .pyc 文件。

即使未在 numpyBasicOps.py 中导入 numbers.pyc 文件，它是如何生成的？为什么输出 numbers.py > 显示？

Answer 1

numpy 将它们自己的类整数对象注册为实现抽象基类 numbers.Integral .为此，它必须使用 import numbers 来访问该对象。

或者至少，它尝试过但失败了；正如您将模块命名为numbers 以及 一样，它被导入了。换句话说，您的 numbers.py 模块屏蔽了内置的 standard library module numbers .

将您的模块重命名为其他名称，并确保删除已创建的 numbers.pyc 文件。