安装PIL时报错：Could not find a version that satisfies the requirement PIL (from versions: ) No matchingdi

当我要安装PIL时，我在cmd下面输入：pip install PIL

错误提示是：

Could not find a version that satisfies the requirement PIL (from versions: )

No matching distribution found for PIL

解决：
直接安装pillow模块，因为pillow中包含了PIL