pip3 install pixellib 的时候遇到这个错误：
ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
tensorflow 2.6.0 requires typing-extensions~=3.7.4, but you have typing-extensions 3.10.0.2 which is incompatible.
查阅 pixellib 官网文档，发现需要安装这个依赖：
- pip3 install pycocotools
