pip install swagger-py-codegen

swagger_py_codegen --swagger-doc api.yml example-app

-s, --swagger, --swagger-doc        Swagger doc file.  [required]
-f, --force                         Force overwrite.
-p, --package                       Package name / application name.
-t, --template-dir                  Path of your custom templates directory.
--spec, --specification             Generate online specification json response.
--ui                                Generate swagger ui.
--help                              Show this message and exit.

$tree
.
|__ api.yml

$ swagger_py_codegen -s  api.yml  example-app -p demo
$ tree
.
|__ api.yml
|__ example-app
   |__ demo
   |  |__ __init__.py
   |  |__ v1
   |     |__ api
   |     |  |__ __init__.py
   |     |  |__ oauth_auth_approach_approach.py
   |     |  |__ oauth_auth_approach.py
   |     |  |__ users_token.py
   |     |  |__ users_current.py
   |     |  |__ users.py
   |     |__ __init__.py
   |     |__ routes.py
   |     |__ schemas.py
   |     |__ validators.py
   |__ requirements.txt

$ cd example-app
$ pip install -r requirements.txt

$ cd demo
$ python __init__.py

$ swagger_py_codegen -s  api.yml  example-app-ui -p demo-ui --ui