app.py

from flask import Flask, request

app = Flask(__name__)

food_items = {  "1":"rice", 
                "2":"beans", 
                "3":"yam", 
                "4":"plantain", 
                "5":"potatoes", 
                "6":"wheat"
            }

@app.route("/api")
def index():
    return  "Hello form Flask API Server"

@app.route('/data', methods = ['POST', 'GET'])
def api():
   if request.method == 'GET':
      return food_items

   if request.method =='POST':
       data = request.json
       food_items.update(data)
       return "Data is inserted"

@app.route("/data/<id>", methods=["PUT"])
def update(id):
    data = request.form['item']
    food_items[str(id)]=data
    return "Data updated"

@app.route("/data/<id>", methods=["DELETE"])
def delete(id):
    food_items.pop(str(id))
    return "Data Deleted"