.pyc 文件在未导入时被创建

Question

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

每当我运行numpyBasicOps.py 时，首先显示numbers.py 的输出，然后是与numpy 模块相关的一些错误：

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，我看到正在为numbers.py 生成一个.pyc 文件。

numbers.pyc 文件未在numpyBasicOps.py 中导入时如何生成？为什么会显示numbers.py 的输出？

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；当您将模块命名为 numbers 以及时，它被导入了。换句话说，您的numbers.py 模块掩盖了内置的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。