Creating API Using Python Flask And MongoDB Client

First Import All Related Libraries

#Import Libraries
from flask import Flask
from pymongo import MongoClient
from flask import request
import json
from bson.json_util import dumps

Creating Connection With MongoDB Client

client = MongoClient('localhost:27017')
db = client.market

Implementation

@app.route("/")
def hello():
    return "Ok it works"

@app.route('/stock', methods=['GET', 'POST', 'PUT', 'DELETE'])
def stock():
    if request.method=='GET':
        try:
            result = db.stocks.find()
            return dumps(result)
        except Exception:
            return dumps({'error' : str("error")})
        

    elif request.method=='POST':
        try:
            result = db.stocks.insert({"Ticker":"XYZ"})
            return dumps(result)
        except Exception:
            return dumps({'error' : str("error")})
        
    elif request.method=='PUT':
        try:
            result = db.stocks.updateMany({"Ticker":"AAMC"},{'$set':{"Ticker":"ABC"}})
            return dumps(result)
        except Exception:
            return dumps({'error' : str("error")})
    
    
    elif request.method=='DELETE':
        try:
            delete_user = db.stocks.delete_one({"Ticker":"ABC"})
            if delete_user.deleted_count > 0 :
                return "", 204
            else:
                return "", 404
        except:
            return "", 500
    else:
        return("ok")

if __name__ == "__main__":
    app.run()


Follow Below Steps Before Run Above Code


step first:

open cmd prompt


step second:

----------------------------


>mkdir rest
>cd rest

----------------------------


step third

----------------------------------


check rest folder created copy path and run command as per screenshot 3


step fourth

----------------------------------------


C:\Users\naveen kumar\rest>virtualenv flask
installation start
script and other folder are created


step fifth

----------------------------------------


again go to the rest folder and copy path where script folder exist
then activate virtual environment by activate command

C:\Users\naveen kumar\rest\flask\Scripts>activate


step six

------------------------------------------


Create python file using any editor but save it into the scipt folder

-------------------------------------------------------


step seven


Now install flask by using given command and see in screeshot

(flask) C:\Users\naveen kumar\rest\flask\Scripts>pip install flask

-------------------------------------------

step eight


Now intall pymongo by using command

(flask) C:\Users\naveen kumar\rest\flask\Scripts>pip install pymongo


step ninth


run python file using command line(sure python file is open in editor)

(flask) C:\Users\naveen kumar\rest\flask\Scripts>python restfullapiflask.py

url is generated on command line

-------------------------------------------


step ten


copy url and paste it into webbrowser like chrome and run 

as per screenshot 8

and you see the output -----Ok it works

-------------------------------------------



now start mongod and mongo
and import json file which you already complete this


-----------------------------------------



install postman and run url http://127.0.0.1:5000/stoks

as per get, put and delete

find output result


thanks



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Get


Post


Delete




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