windows上安装tensorflow

tensorflow0.12版本支持windows，需要python3.5.x。

安装python3.5.x

下载：python3.5.2

安装：

第一个Install Now是默认安装在c盘的，第二个是自己选择安装路径。
我选择第二个，同时将Add Python 3.5 to PATH勾选上。

这一步可以都勾选上。

这一步的时候我没有勾选最后一项，虽然安装成功了，但是运行的时候报错，所以最好都选上。然后开始进行安装。

安装成功。

安装tensorflow

> pip install tensorflow
# 或
> pip install --upgrade https://storage.googleapis.com/tensorflow/windows/cpu/tensorflow-0.12.0rc0-cp35-cp35m-win_amd64.whl

GPU版本

> pip install tensorflow-gpu  # 需CUDA 8
# 或
> pip install --upgrade https://storage.googleapis.com/tensorflow/windows/gpu/tensorflow_gpu-0.12.0rc0-cp35-cp35m-win_amd64.whl

安装成功后运行

>import tensorflow as tf

如果没有勾选Download debug binaries (requires VS 2015 or later )，报错：

Traceback (most recent call last):
  File "C:\Users\mark\AppData\Local\Programs\Python\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow.py", line 19, in swig_import_helper
    return importlib.import_module(mname)
  File "C:\Users\mark\AppData\Local\Programs\Python\Python35\lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "", line 986, in _gcd_import
  File "", line 969, in _find_and_load
  File "", line 958, in _find_and_load_unlocked
  File "", line 666, in _load_unlocked
  File "", line 577, in module_from_spec
  File "", line 906, in create_module
  File "", line 222, in _call_with_frames_removed
ImportError: DLL load failed: The specified module could not be found.

解决方法：
Install Microsoft Visual C++ 2015 Redistributable Update 3 x64.