安装或更新时，与pip升级或卸载某模块时出错

pip出错，“No module named ‘pip’”

解决办法：

在pycharm终端(Terminal）中

　　首先执行 ：python -m ensurepip 

　　然后执行 ：python -m pip install --upgrade pip

pip升级或卸载某模块时（如 pip3 install --ignore-installed --upgrade scipy）如果出现下列报错：

Cannot uninstall 'xxx'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.

可通过添加' --ignore-installed'解决

pip3 install --ignore-installed --upgrade scipy