我正在尝试安装“pip install mysqlclient”并且每次都失败。尝试了所有其他的事情，但也没有工作。我该怎么办？

Question

我正在尝试install pip install mysqlclient，它每次失败。我也尝试了pip install --only-binary :all: mysqlclient，也没有工作。然后我也下载了whl文件，也没用。我需要帮助。使用python 3.7.2和pip 19.0.2版本。这是弹出的整个错误：

Running setup.py clean for mysqlclient
Failed to build mysqlclient
Installing collected packages: mysqlclient
Running setup.py install for mysqlclient ... error
  Complete output from command c:\users\vertig~1.0\envs\mypro\scripts\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\VERTIG~1.0\\AppData\\Local\\Temp\\pip-install-b81i8gmq\\mysqlclient\\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\VERTIG~1.0\AppData\Local\Temp\pip-record-6s1gmot9\install-record.txt --single-version-externally-managed --compile --install-headers c:\users\vertig~1.0\envs\mypro\include\site\python3.7\mysqlclient:
  running install
  running build
  running build_py
  creating build
  creating build\lib.win32-3.7
  creating build\lib.win32-3.7\MySQLdb
  copying MySQLdb\__init__.py -> build\lib.win32-3.7\MySQLdb
  copying MySQLdb\_exceptions.py -> build\lib.win32-3.7\MySQLdb
  copying MySQLdb\compat.py -> build\lib.win32-3.7\MySQLdb
  copying MySQLdb\connections.py -> build\lib.win32-3.7\MySQLdb
  copying MySQLdb\converters.py -> build\lib.win32-3.7\MySQLdb
  copying MySQLdb\cursors.py -> build\lib.win32-3.7\MySQLdb
  copying MySQLdb\release.py -> build\lib.win32-3.7\MySQLdb
  copying MySQLdb\times.py -> build\lib.win32-3.7\MySQLdb
  creating build\lib.win32-3.7\MySQLdb\constants
  copying MySQLdb\constants\__init__.py -> build\lib.win32-3.7\MySQLdb\constants
  copying MySQLdb\constants\CLIENT.py -> build\lib.win32-3.7\MySQLdb\constants
  copying MySQLdb\constants\CR.py -> build\lib.win32-3.7\MySQLdb\constants
  copying MySQLdb\constants\ER.py -> build\lib.win32-3.7\MySQLdb\constants
  copying MySQLdb\constants\FIELD_TYPE.py -> build\lib.win32-3.7\MySQLdb\constants
  copying MySQLdb\constants\FLAG.py -> build\lib.win32-3.7\MySQLdb\constants
  running build_ext
  building 'MySQLdb._mysql' extension
  error: Microsoft Visual C++ 14.0 is required. Get it with "Microsoft Visual C++ Build Tools": https://visualstudio.microsoft.com/downloads/

  ----------------------------------------
Command "c:\users\vertig~1.0\envs\mypro\scripts\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\VERTIG~1.0\\AppData\\Local\\Temp\\pip-install-b81i8gmq\\mysqlclient\\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\VERTIG~1.0\AppData\Local\Temp\pip-record-6s1gmot9\install-record.txt --single-version-externally-managed --compile --install-headers c:\users\vertig~1.0\envs\mypro\include\site\python3.7\mysqlclient" failed with error code 1 in C:\Users\VERTIG~1.0\AppData\Local\Temp\pip-install-b81i8gmq\mysqlclient\```

So any ideas where the error is getting?

Answer 1

错误：需要Microsoft Visual C ++ 14.0。使用“Microsoft Visual C ++构建工具”获取它：https://visualstudio.microsoft.com/downloads/

从错误消息中可以清楚地看出，问题在于您的计算机上安装了C ++。

仅供参考：许多Python库在引擎盖下使用C ++，因此必须按照错误中的说明安装Microsoft visual c ++（在Windows上）。您可以继续从here或here安装Microsoft Visual C ++

或者如果mysqlclient背后没有特别的用途，你可以使用这个名为PyMySQL的纯pyython MySQL客户端库（你不需要安装visual c ++来使用这个lib）。