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windowsにネイティブサポートしたTensorflowを動かす

Last updated at Posted at 2016-12-03

TensorflowがWindowsのネイティブサポートをしたのでインストール
こちらの続きになります。


こちらの環境は、最新(AnniversaryUpdate済み)Windows10、64bitです。

さて、前回インストールに成功しました。
Pythonで実際にインポートに挑戦してみます。
pythonコマンドを入力すると、対話型のプログラムが入力できます。
特に設定をしないと、python.exeはここにあるはず。

C:\Users\ユーザ名\AppData\Local\Programs\Python\Python35

このディレクトリを環境変数Pathに追加しておいてください。

>>> import tensorflow
Traceback (most recent call last):
  File "C:\Users\a1503\AppData\Local\Programs\Python\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow.py", line 18, in swig_import_helper
    return importlib.import_module(mname)
  File "C:\Users\a1503\AppData\Local\Programs\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: 指定されたモジュールが見つかりません。

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\a1503\AppData\Local\Programs\Python\Python35\lib\site-packages\tensorflow\python\__init__.py", line 54, in <module>
    from tensorflow.python import pywrap_tensorflow
  File "C:\Users\a1503\AppData\Local\Programs\Python\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow.py", line 21, in <module>
    _pywrap_tensorflow = swig_import_helper()
  File "C:\Users\a1503\AppData\Local\Programs\Python\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow.py", line 20, in swig_import_helper
    return importlib.import_module('_pywrap_tensorflow')
  File "C:\Users\a1503\AppData\Local\Programs\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'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\a1503\AppData\Local\Programs\Python\Python35\lib\site-packages\tensorflow\__init__.py", line 24, in <module>
    from tensorflow.python import *
  File "C:\Users\a1503\AppData\Local\Programs\Python\Python35\lib\site-packages\tensorflow\python\__init__.py", line 60, in <module>
    raise ImportError(msg)
ImportError: Traceback (most recent call last):
  File "C:\Users\a1503\AppData\Local\Programs\Python\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow.py", line 18, in swig_import_helper
    return importlib.import_module(mname)
  File "C:\Users\a1503\AppData\Local\Programs\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: 指定されたモジュールが見つかりません。

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\a1503\AppData\Local\Programs\Python\Python35\lib\site-packages\tensorflow\python\__init__.py", line 54, in <module>
    from tensorflow.python import pywrap_tensorflow
  File "C:\Users\a1503\AppData\Local\Programs\Python\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow.py", line 21, in <module>
    _pywrap_tensorflow = swig_import_helper()
  File "C:\Users\a1503\AppData\Local\Programs\Python\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow.py", line 20, in swig_import_helper
    return importlib.import_module('_pywrap_tensorflow')
  File "C:\Users\a1503\AppData\Local\Programs\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'


Error importing tensorflow.  Unless you are using bazel,
you should not try to import tensorflow from its source directory;
please exit the tensorflow source tree, and relaunch your python interpreter
from there.
>>>

長すぎる!

Pythonにも詳しく無いのでエラーの見方もわからない。
ということで、検索してみました。
エラーメッセージから一行抜き出して、
#google検索「Error importing tensorflow. Unless you are using bazel, "windows"」

githubでそれっぽいものを発見。
https://github.com/tensorflow/tensorflow/issues/5949
mrryさんの回答を参考にさせていただきました。

Microsoft Visual C++ 2015 Redistributable Update 3
こちらのexeファイルをダウンロードして実行して、もう一度importを実行してみます。

>>> import tensorflow
>>>

上手くいきました。

ここまで来たら後は簡単。
単純なプログラムを動かしてみます。

>>> import tensorflow as tf
>>> hello = tf.constant('Hello tensorflow')
>>> sess = tf.Session()
>>> print(sess.run(hello))
b'Hello tensorflow'
>>>

動きました!
今回はエラーメッセージで直接検索したら解決したので、他の種類のエラーが出た方でも直接検索でなんとかなるかもしれませんね。
これでついに機械学習に挑戦できそうです。

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