pip install pyinstaller (安装过程报错解决)

安装目标：pip install pyinstaller 

报错内容：

WARNING: You are using pip version 19.2.3, however version 20.0.2 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

解决方法：

运行--->cmd

使用 python -m pip install -U --force-reinstall pip 升级成功

Successfully installed pip-20.0.2

接下来又报错了 pip install pyinstaller  报错内容： time out 

解决方法：  pip --default-timeout=100 install -U pyinstaller

Successfully built pyinstaller
Installing collected packages: altgraph, pywin32-ctypes, future, pefile, pyinstaller