今天更新完Windows 10电脑后，我在自己用Anaconda2创建的Python 3.5虚拟环境里导入pandas时，突然触发了这个错误：

import pandas as pd
AttributeError: module 'numpy' has no attribute '__version__'

我已经排查过本地没有和numpy重名的numpy.py文件，也尝试过一些常见的解决方案，但都没能解决问题。

完整的报错回溯信息如下：

Python 3.5.5 | packaged by conda-forge | (default, Apr 6 2018, 16:03:44) [MSC v.1900 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import pandas as pd
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\j267156\AppData\Local\Continuum\anaconda2\envs\sf35\lib\site-packages\pandas\__init__.py", line 23, in <module>
    from pandas.compat.numpy import *
  File "C:\Users\j267156\AppData\Local\Continuum\anaconda2\envs\sf35\lib\site-packages\pandas\compat\numpy\__init__.py", line 10, in <module>
    _np_version = np.__version__
AttributeError: module 'numpy' has no attribute '__version__'

我做了几次补充测试，结果都不太正常：

1. 直接导入numpy后尝试获取基本属性全报错：

import numpy
print(numpy.__file__)
# AttributeError: module 'numpy' has no attribute '__file__'
print(numpy.version.version)
# AttributeError: module 'numpy' has no attribute 'version'

2. 尝试调用numpy的基础函数也失败，查看模块属性只有寥寥几个：

import numpy as np
np.zeros(5)
# AttributeError: module 'numpy' has no attribute 'zeros'
vars(np).keys()
# dict_keys(['__name__', '__package__', '__spec__', '__loader__', '__doc__', '__path__'])

3. 查看numpy的路径和加载器信息：

import numpy as np
In [7]: np.__path__
Out[7]: _NamespacePath(['C:\Users\j267156\AppData\Local\Continuum\anaconda2\envs\sf35\lib\site-packages\numpy'])
In [8]: np.__loader__
Out[8]: <_frozen_importlib_external._NamespaceLoader at 0x2033a3c8080>

看起来numpy模块好像没有被正确加载，有没有大佬能帮我解决这个问题？

内容的提问来源于stack exchange，提问作者ktj1989