已安裝numpy 1.14.2，又conda 命令安裝numpy，自動檢測最新版本安裝了numpy1.13.1

執行import numpy as np

報錯，如下：

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-1-4ee716103900> in <module>()
----> 1 import numpy as np

C:\Anaconda\Anaconda\envs\tensorflow\lib\site-packages\numpy\__init__.py in <module>()
    140         return loader(*packages, **options)
    141 
--> 142     from . import add_newdocs
    143     __all__ = ['add_newdocs',
    144                'ModuleDeprecationWarning',

C:\Anaconda\Anaconda\envs\tensorflow\lib\site-packages\numpy\add_newdocs.py in <module>()
     11 from __future__ import division, absolute_import, print_function
     12 
---> 13 from numpy.lib import add_newdoc
     14 
     15 ###############################################################################

C:\Anaconda\Anaconda\envs\tensorflow\lib\site-packages\numpy\lib\__init__.py in <module>()
      6 from numpy.version import version as __version__
      7 
----> 8 from .type_check import *
      9 from .index_tricks import *
     10 from .function_base import *

C:\Anaconda\Anaconda\envs\tensorflow\lib\site-packages\numpy\lib\type_check.py in <module>()
      9            'common_type']
     10 
---> 11 import numpy.core.numeric as _nx
     12 from numpy.core.numeric import asarray, asanyarray, array, isnan, zeros
     13 from .ufunclike import isneginf, isposinf

C:\Anaconda\Anaconda\envs\tensorflow\lib\site-packages\numpy\core\__init__.py in <module>()
     36 from . import numerictypes as nt
     37 multiarray.set_typeDict(nt.sctypeDict)
---> 38 from . import numeric
     39 from .numeric import *
     40 from . import fromnumeric

C:\Anaconda\Anaconda\envs\tensorflow\lib\site-packages\numpy\core\numeric.py in <module>()
   1818 
   1819 # Use numarray's printing function
-> 1820 from .arrayprint import array2string, get_printoptions, set_printoptions
   1821 
   1822 

C:\Anaconda\Anaconda\envs\tensorflow\lib\site-packages\numpy\core\arrayprint.py in <module>()
     42 from .umath import absolute, not_equal, isnan, isinf, isfinite, isnat
     43 from . import multiarray
---> 44 from .multiarray import (array, dragon4_positional, dragon4_scientific,
     45                          datetime_as_string, datetime_data, dtype, ndarray,
     46                          set_legacy_print_mode)

ImportError: cannot import name 'dragon4_positional'
 

嘗試①

pip uninstall numpy和conda removenumpy都只能解除安裝numpy1.13.1版本，

於是解除安裝1.13.1版本，

結果仍然報錯

嘗試②

手動刪除numpy1.14.1的資料夾，解除安裝numpy1.13.1再重新安裝它，

結果：報錯同原錯誤

嘗試③

conda update conda

conda update anaconda

conda update python

更新anaconda和python時間較長，耐心等待。原先用的若是python3.5.x，則更新會更新到python3.5.x的最高版本。

更新後conda list，會發現numpy的版本是1.12.1

執行，ok