pipenv install 安装Pipfile文件中所有的包，务必要保证Pipfile文件的包名都是正确的（否则会无法成功）

特别注意：有一次我把Flask-SQLAlchemy的名称写错了，半天都安装不了！所有的python包在https://pypi.org/都可以查询到的！查询不到肯定就有问题！

[[source]]
name = "pypi"
url = "https://pypi.org/simple"
verify_ssl = true

[dev-packages]

[packages]
flask = "*"
flask-restful = "*"
wtforms = "*"
websocket = "*"
requests = "*"
Flask-SQLalchemy = "*"
pymysql = "*"
flask-httpauth = "*"

[requires]
python_version = "3.7"