本文轉載自：http://blog.csdn.net/pjl6523853/article/details/72836214

windows上安裝tensorflow時報錯，“DLL load failed: 找不到指定的模組”的解決方式

最近打算開始研究一下機器學習，今天在windows上裝tensorflow花了點功夫，其實前面的步驟不難，只要依次裝好python3.5，numpy，tensorflow就行了，有一點要注意的是目前只有python3.5能裝tensorflow，最新版的python3.6都不行。

裝好tensorflow後，我建議大家不要直接用測試用例進行測試（如果沒裝好的話出現的錯誤一般都是：module ‘tensorflow’ has no attribute ‘constant’）。第一次測試時可以在python shell裡面輸入：

import tensorflow

如果沒有報錯，恭喜你，十有八九是裝好了，這時可以再用簡單的測試用例測試一下。但我估計沒報錯的話你也不會看到這篇部落格了。。。

事實上，我第一次安裝的時候出現瞭如下錯誤： 
Traceback (most recent call last): 
File “D:\Python\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow_internal.py”, line 18, in swig_import_helper 
return importlib.import_module(mname) 
File “D:\Python\Python35\lib\importlib__init__.py”, line 126, in import_module 
return _bootstrap._gcd_import(name[level:], package, level) 
File “frozen importlib._bootstrap”, line 986, in _gcd_import 
File “frozen importlib._bootstrap”, line 969, in _find_and_load 
File “frozen importlib._bootstrap”, line 958, in _find_and_load_unlocked 
File “frozen importlib._bootstrap”, line 666, in _load_unlocked 
File “frozen importlib._bootstrap”, line 577, in module_from_spec 
File “frozen importlib._bootstrap_external”, line 906, in create_module 
File “frozen importlib._bootstrap”, line 222, in _call_with_frames_removed 
ImportError: DLL load failed: 找不到指定的模組。

During handling of the above exception, another exception occurred:

Traceback (most recent call last): 
File “D:\Python\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow.py”, line 41, in module 
from tensorflow.python.pywrap_tensorflow_internal import * 
File “D:\Python\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow_internal.py”, line 21, in module 
_pywrap_tensorflow_internal = swig_import_helper() 
File “D:\Python\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow_internal.py”, line 20, in swig_import_helper 
return importlib.import_module(‘_pywrap_tensorflow_internal’) 
File “D:\Python\Python35\lib\importlib__init__.py”, line 126, in import_module 
return _bootstrap._gcd_import(name[level:], package, level) 
ImportError: No module named ‘_pywrap_tensorflow_internal’

During handling of the above exception, another exception occurred:

Traceback (most recent call last): 
File “pyshell#0”, line 1, in module 
import tensorflow 
File “D:\Python\Python35\lib\site-packages\tensorflow__init__.py”, line 24, in module 
from tensorflow.python import * 
File “D:\Python\Python35\lib\site-packages\tensorflow\python__init__.py”, line 51, in module 
from tensorflow.python import pywrap_tensorflow 
File “D:\Python\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow.py”, line 52, in module 
raise ImportError(msg) 
ImportError: Traceback (most recent call last): 
File “D:\Python\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow_internal.py”, line 18, in swig_import_helper 
return importlib.import_module(mname) 
File “D:\Python\Python35\lib\importlib__init__.py”, line 126, in import_module 
return _bootstrap._gcd_import(name[level:], package, level) 
File “frozen importlib._bootstrap”, line 986, in _gcd_import 
File “frozen importlib._bootstrap”, line 969, in _find_and_load 
File “frozen importlib._bootstrap”, line 958, in _find_and_load_unlocked 
File “frozen importlib._bootstrap”, line 666, in _load_unlocked 
File “frozen importlib._bootstrap”, line 577, in module_from_spec 
File “frozen importlib._bootstrap_external”, line 906, in create_module 
File “frozen importlib._bootstrap”, line 222, in _call_with_frames_removed 
ImportError: DLL load failed: 找不到指定的模組。

During handling of the above exception, another exception occurred:

Traceback (most recent call last): 
File “D:\Python\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow.py”, line 41, in module 
from tensorflow.python.pywrap_tensorflow_internal import * 
File “D:\Python\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow_internal.py”, line 21, in module 
_pywrap_tensorflow_internal = swig_import_helper() 
File “D:\Python\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow_internal.py”, line 20, in swig_import_helper 
return importlib.import_module(‘_pywrap_tensorflow_internal’) 
File “D:\Python\Python35\lib\importlib__init__.py”, line 126, in import_module 
return _bootstrap._gcd_import(name[level:], package, level) 
ImportError: No module named ‘_pywrap_tensorflow_internal’

Failed to load the native TensorFlow runtime.

for some common reasons and solutions. Include the entire stack trace 
above this error message when asking for help.

之前在網上查安裝方法時，大多數都說要裝一個Anaconda，但我是直接裝的python3.5，所以沒裝Anaconda，我相信問題不在這裡。後來看到有人說裝了visual studio2017解決了這個錯誤，我想不至於吧，裝個tensorflow還要裝個visual studio2017？事實上只是visual studio2017中剛好有執行tensorflow必須的執行時環境。所以，只要安裝一下缺少的執行時環境就可以了，可以在如下網站中按照它的install instructions進行安裝，非常簡單，只要注意選對32位和64位的版本就行了。

裝好後tensorflow就可以正常使用了~