pip install *:ERROR: Exception: Traceback (most recent call last)

使用pip install 某些模块发生安装错误：

Traceback (most recent call last):
  File "d:\python3.7.4\lib\site-packages\pip\_vendor\urllib3\response.py", line 425, in _error_catcher
    yield
  File "d:\python3.7.4\lib\site-packages\pip\_vendor\urllib3\response.py", line 507, in read
    data = self._fp.read(amt) if not fp_closed else b""
  File "d:\python3.7.4\lib\site-packages\pip\_vendor\cachecontrol\filewrapper.py", line 62, in read
    data = self.__fp.read(amt)
  File "d:\python3.7.4\lib\http\client.py", line 457, in read
    n = self.readinto(b)
  File "d:\python3.7.4\lib\http\client.py", line 501, in readinto
    n = self.fp.readinto(b)
  File "d:\python3.7.4\lib\socket.py", line 589, in readinto
    return self._sock.recv_into(b)
  File "d:\python3.7.4\lib\ssl.py", line 1071, in recv_into
    return self.read(nbytes, buffer)
  File "d:\python3.7.4\lib\ssl.py", line 929, in read
    return self._sslobj.read(len, buffer)
socket.timeout: The read operation timed out

During handling of the above exception, another exception occurred:

解决方法：替换镜像地址

如：pip install PySide2 -i https://pypi.douban.com/simple