运行报错没有 ModuleNotFoundErrorNo module named PIL

运行时报错：

 ModuleNotFoundError: No module named 'PIL'

运行安装命令：

pip install pillow

如果显示已经安装了：

Requirement already satisfied: pillow in /anaconda3/lib/python3.7/site-packages (5.4.1)

运行卸载命令:

 pip uninstall pillow

再次安装：

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