Solution:
1. Switch to C: \ Program Files \ Python37 \ Scripts
2. Perform python pip.exe install SomePackage installation
3. After the successful installation perform error still pip
4. After viewing the installation is successful, prompted to upgrade pip
5. Do python -m pip install --upgrade pip // (if slow to update, change this) Python install --upgrade PIP PIP -m -i https://pypi.douban.com/simple
6. After the upgrade is successful, execute pip again, OK the