For FASTAPI 

https://fastapi.tiangolo.com/tutorial/

Documentation

https://fastapi.tiangolo.com/tutorial/first-steps/

pip install fastapi uvicorn jinja2

python -m uvicorn Backend:app --reload

//uvicorn Step1:app --reload

uvicorn : The term 'uvicorn' is not recognized as the name of a cmdlet, function, script file, or 
operable program. Check the spelling of the name, or if a path was included, verify that the path is 
correct and try again.
At line:1 char:1
+ uvicorn Step1:app --reload
+ ~~~~~~~
    + CategoryInfo          : ObjectNotFound: (uvicorn:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException
 

 Step 1:

 python -m uvicorn Step1:app --reload  


 Hello World Success 

http://localhost:8000/

{"message":"Hello World"}

 Step 2:

python -m uvicorn Step2:app --reload

 CRUD 

Read: http://localhost:8000/items/
Read by ID: http://localhost:8000/items/
Create POST reqeust: http://localhost:8000/items
JSON body:
{
  "name": "Example Item",
  "description": "This is a sample item."
}

Response (HTTP 200):

{
    "message": "Item created successfully",
    "item": {
        "name": "Example Item",
        "description": "This is a sample item."
    }
}

Put Request: http://localhost:8000/items/0
JSON Body:
{
  "name": "Example Item1",
  "description": "This is a sample item."
}
Response (HTTP 200):
{
    "message": "Item updated successfully",
    "item": {
        "name": "Example Item1",
        "description": "This is a sample item."
    }
}

Delete Request: http://localhost:8000/items/0
Response (HTTP 200):
{
    "message": "Item deleted successfully",
    "item": {
        "name": "Example Item5",
        "description": "This is a sample item."
    }
}


CORS issue can be solved through open Step1CORS.py and Step2CORS.py which already enable CORS 

Last but not least add Database SQLite

pip install fastapi[all] sqlalchemy


For Step3_DB.py

GET http://localhost:8000/items

[
    {
        "id": 1,
        "name": "123",
        "description": null
    },
    {
        "id": 2,
        "name": "123",
        "description": null
    },
    {
        "id": 3,
        "name": "213",
        "description": null
    },
    {
        "id": 4,
        "name": "213",
        "description": null
    },
    {
        "id": 5,
        "name": "1234576",
        "description": null
    },
    {
        "id": 6,
        "name": "123",
        "description": null
    },
    {
        "id": 7,
        "name": "123",
        "description": null
    },
    {
        "id": 8,
        "name": "123",
        "description": null
    },
    {
        "id": 9,
        "name": "123",
        "description": null
    }
]