1、　poetry init
2、　poetry add package.
    # More examples，refer to: https://python-poetry.org/docs
    # Allow >=2.0.5, <3.0.0 versions
    poetry add pendulum@^2.0.5

    # Allow >=2.0.5, <2.1.0 versions
    poetry add pendulum@~2.0.5

    # Allow >=2.0.5 versions, without upper bound
    poetry add "pendulum>=2.0.5"

    # Allow only 2.0.5 version
    poetry add pendulum==2.0.5
3、 poetry install 
4、 激活虚拟环境　poetry shell