通过pip install tesserocr pillow 安装tesserocr失败
报错如下：
C:\Users\Administrator>pip install tesserocr pillow
Failed building wheel for tesserocr
Running setup.py clean for tesserocr
Failed to build tesserocr
Installing collected packages: tesserocr
Running setup.py install for tesserocr ... error
........（部分信息省略）
warnings.warn(msg)
running install
running build
running build_ext
building 'tesserocr' extension
error: Microsoft Visual C++ 14.0 is required. Get it with "Microsoft Visual C++ Build Tools": http://landinghub.visualstudio.com/visual-cpp-build-tools----------------------------------------
Command "d:\python3\anaconda3\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\pip-install-fa810tiw\\tesserocr\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record C:\Users\ADMINI~1\AppData\Local\Temp\pip-record-g7y85190\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in
解决方法如下：
直接下载whl文件，然后进入文件存放的文件夹，打开cmd进行安装即可
C:\Users\Administrator\Desktop>pip install tesserocr-2.2.2-cp36-cp36m-win_amd64.whl
Processing c:\users\administrator\desktop\tesserocr-2.2.2-cp36-cp36m-win_amd64.whl
Installing collected packages: tesserocr
Successfully installed tesserocr-2.2.2
whl文件下载链接：https://github.com/simonflueckiger/tesserocr-windows_build/releases
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