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我正在尝试安装 pyCrypto（通过 pip3 install pycrypto），但我不断收到此错误：

  Failed building wheel for pycrypto
  Running setup.py clean for pycrypto
Failed to build pycrypto
Installing collected packages: pycrypto
  Running setup.py install for pycrypto ... error
    Complete output from command c:\users\1007238\appdata\local\programs\python\python36-32\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\1007238\\AppData\\Local\\Temp\\pip-build-pm8w3iz2\\pycrypto\\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\1007238\AppData\Local\Temp\pip-rd551f7l-record\install-record.txt --single-version-externally-managed --compile:
    running install
    running build
    running build_py
    creating build
    creating build\lib.win32-3.6
    creating build\lib.win32-3.6\Crypto
    copying lib\Crypto\pct_warnings.py -> build\lib.win32-3.6\Crypto

安装顺利，直到：

    C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD …