Airflow安裝異常:ERROR: flask-appbuilder 1.12.3 has requirement Flask<2,>=0.12, but you'll have flask 0.11.1 which is incompatible.

1 詳細異常：

ERROR: flask-appbuilder 1.12.3 has requirement Flask<2,>=0.12, but you'll have flask 0.11.1 which is incompatible.
ERROR: flask-appbuilder 1.12.3 has requirement Flask-Login<0.5,>=0.3, but you'll have flask-login 0.2.11 which is incompatible.
ERROR: flask-appbuilder 1.12.3 has requirement Flask-WTF<1,>=0.14.2, but you'll have flask-wtf 0.14 which is incompatible.

　　

2 問題原因：

　　自己pip安裝的包依賴了其他版本的其他組件（Flask等），但是已經安裝了不兼容的版本

 

3 解決辦法，卸載版本不對的其他組件，然后單獨制定兼容的版本號，重新安裝

　　pip uninstall Flask

　　pip install Flask===1.9 （這個范圍內的<2,>=0.12）

 

其他的就不舉例了