已解决ImportError: No module named ‘face_recognition‘
这个问题搞了好久，网上的方法试了一圈，什么装cmake、装boost、更新pip、用conda装(没有找到包)，都不适用我的问题。
用自动安装的指令：pip install face_recognition，一装就报错：
(tfenv) C:\Users\1>pip install face_recognition
Collecting face_recognition
Downloading http://mirrors.aliyun.com/pypi/packages/1e/95/f6c9330f54ab07bfa032bf3715c12455a381083125d8880c43cbe76bb3d0/face_recognition-1.3.0-py2.py3-none-any.whl
Collecting dlib>=19.7 (from face_recognition)
Downloading http://mirrors.aliyun.com/pypi/packages/f1/40/e407366816646bb452578997e6ca2140f004eec8f611e8512ee429ded2be/dlib-19.20.0.tar.gz (3.2MB)
100% |████████████████████████████████| 3.2MB 10.2MB/s
Requirement already satisfied: numpy in d:\programdata\anaconda3\envs\tfenv\lib\site-packages (from face_recognition)
Requirement already satisfied: face-recognition-models>=0.3.0 in d:\programdata\anaconda3\envs\tfenv\lib\site-packages (from face_recognition)
Requirement already satisfied: Click>=6.0 in d:\programdata\anaconda3\envs\tfenv\lib\site-packages (from face_recognition)
Requirement already satisfied: Pillow in d:\programdata\anaconda3\envs\tfenv\lib\site-packages (from face_recognition)
Requirement already satisfied: olefile in d:\programdata\anaconda3\envs\tfenv\lib\site-packages (from Pillow->face_recognition)
Building wheels for collected packages: dlib
Running setup.py bdist_wheel for dlib ... error
仔细看，这个指令执行一开始，就到阿里云网站下载一个叫：face_recognition-1.3.0-py2.py3-none-any.whl的东西。
还提示Collecting dlib>=19.7 (from face_recognition)，但我的dlib版本是19.4的
突发奇想，会不会是版本适配的坑，因为pip下载不手动指定版本，一般默认下载最新版。。。
在网上找到，face_recognition的下载地址。
里面有很多版本的安装包。
找一个点进去，找一个对应自己python版本的包下载。
查看python的方法：在prompt终端中输入python，看到我的python是3.5.4的，所以1.2.3这个包不适合我。
(tfenv) D:\ProgramData\Anaconda3\envs\tfenv\Lib\site-packages>python
Python 3.5.4 |Anaconda custom (64-bit)| (default, Aug 14 2017, 13:41:13) [MSC v.1900 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>
再按ctrl+c退出python环境。
包下载好以后，我把他放在了这个路径下：D:\ProgramData\Anaconda3\envs\tfenv\Lib\site-packages
然后在prompt终端进入到这个路径下，用pip指令安装，版本不对的话会报下面的错：
(tfenv) D:\ProgramData\Anaconda3\envs\tfenv\Lib\site-packages>pip install face_recognition-1.0.0-py2.py3-none-any.whl
Processing d:\programdata\anaconda3\envs\tfenv\lib\site-packages\face_recognition-1.0.0-py2.py3-none-any.whl
Requirement already satisfied: scipy>=0.17.0 in d:\programdata\anaconda3\envs\tfenv\lib\site-packages (from face-recognition==1.0.0)
Requirement already satisfied: Click>=6.0 in d:\programdata\anaconda3\envs\tfenv\lib\site-packages (from face-recognition==1.0.0)
Requirement already satisfied: face-recognition-models>=0.2.0 in d:\programdata\anaconda3\envs\tfenv\lib\site-packages (from face-recognition==1.0.0)
Requirement already satisfied: numpy in d:\programdata\anaconda3\envs\tfenv\lib\site-packages (from face-recognition==1.0.0)
Requirement already satisfied: Pillow in d:\programdata\anaconda3\envs\tfenv\lib\site-packages (from face-recognition==1.0.0)
Collecting dlib>=19.5 (from face-recognition==1.0.0)
Downloading http://mirrors.aliyun.com/pypi/packages/f1/40/e407366816646bb452578997e6ca2140f004eec8f611e8512ee429ded2be/dlib-19.20.0.tar.gz (3.2MB)
100% |████████████████████████████████| 3.2MB 6.3MB/s
Requirement already satisfied: olefile in d:\programdata\anaconda3\envs\tfenv\lib\site-packages (from Pillow->face-recognition==1.0.0)
Building wheels for collected packages: dlib
Running setup.py bdist_wheel for dlib ... error
报错信息Collecting dlib>=19.5 (from face-recognition==1.0.0)，而我的dlib版本是19.4的。
重新下载一个版本用这个指令安装：pip install face_recognition-0.1.14-py2.py3-none-any.whl
(tfenv) D:\ProgramData\Anaconda3\envs\tfenv\Lib\site-packages>pip install face_recognition-0.1.14-py2.py3-none-any.whl
Processing d:\programdata\anaconda3\envs\tfenv\lib\site-packages\face_recognition-0.1.14-py2.py3-none-any.whl
Requirement already satisfied: face-recognition-models in d:\programdata\anaconda3\envs\tfenv\lib\site-packages (from face-recognition==0.1.14)
Requirement already satisfied: numpy in d:\programdata\anaconda3\envs\tfenv\lib\site-packages (from face-recognition==0.1.14)
Requirement already satisfied: scipy>=0.17.0 in d:\programdata\anaconda3\envs\tfenv\lib\site-packages (from face-recognition==0.1.14)
Requirement already satisfied: Pillow in d:\programdata\anaconda3\envs\tfenv\lib\site-packages (from face-recognition==0.1.14)
Requirement already satisfied: Click>=6.0 in d:\programdata\anaconda3\envs\tfenv\lib\site-packages (from face-recognition==0.1.14)
Requirement already satisfied: dlib>=19.3.0 in d:\programdata\anaconda3\envs\tfenv\lib\site-packages (from face-recognition==0.1.14)
Requirement already satisfied: olefile in d:\programdata\anaconda3\envs\tfenv\lib\site-packages (from Pillow->face-recognition==0.1.14)
Installing collected packages: face-recognition
Successfully installed face-recognition-0.1.14
在spyder中import face_recognition，成功！