解决“command not found: flask”

安装完flask后

>>> export FLASK_APP=hello.py
>>> export FLASK_ENV=development
>>> flask run
zsh: command not found: flask

原因是需要将~/.local/bin写入环境变量
临时生效：

>>> export PATH=$PATH:~/.local/bin/

永久生效：

>>> vim ~/.zshrc
export PATH=$PATH:~/.local/bin/