我今天更新了我的电脑，当我试图导入pandas时，收到以下错误消息：

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

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我尝试了以下链接的建议：

1. AttributeError: 'module' object has no attribute 'version'
2. AttributeError: 'module' object has no attribute 'version'的
   除了numpy包，我没有任何文件名numpy.py。
   我在windows10中运行anaconda2，并创建了一个python 3.5虚拟环境。
   以下是完整的错误消息：

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__'

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编辑：执行以下命令会出现错误

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

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编辑2：执行以下命令会出现以下错误：

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__'])

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Edit3：以下命令会产生以下输出：

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>

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