π PYTHON β DAY 54 STUDY MATERIAL
β¨ Topic: Introduction to REST API Development using Flask
βββββββββββββββββββ
π What is Flask?
Flask is a lightweight Python web framework used to build:
β Web applications
β REST APIs
β Backend services
It is simple, flexible, and widely used in Python backend development.
βββββββββββββββββββ
π¦ Install Flask
pip install flask
Import in Python:
from flask import Flask
βββββββββββββββββββ
π₯ Creating First Flask App
from flask import Flask
app = Flask(name)
@app.route("/")
def home():
return "Hello, Flask API!"
app.run(debug=True)
Run the program and open browser:
http://127.0.0.1:5000
βββββββββββββββββββ
π Creating API Endpoint
from flask import Flask, jsonify
app = Flask(name)
@app.route("/api")
def api():
data = {"message": "Hello API"}
return jsonify(data)
app.run(debug=True)
Output:
{ "message": "Hello API" }
βββββββββββββββββββ
πΉ Handling URL Parameters
@app.route("/user/")
def user(name):
return "Hello " + name
Example:
http://127.0.0.1:5000/user/Soham
Output:
Hello Soham
βββββββββββββββββββ
πΉ Handling JSON Request (POST)
from flask import request
@app.route("/data", methods=["POST"])
def receive():
data = request.json
return {"received": data}
βββββββββββββββββββ
π§ Where Flask APIs Are Used?
β Mobile app backends
β Web application backends
β AI model APIs
β Microservices architecture
βββββββββββββββββββ
π Practice Tasks β Day 54
β Install Flask
β Create simple API
β Return JSON response
β Use URL parameter
βββββββββββββββββββ
π― Day 54 Goal
β Understand Flask framework
β Create simple REST API
β Handle requests and responses
βββββββββββββββββββ
π Next Topic β Day 55
π₯ Connecting Flask with Database (SQLite)
β¨ Stay Connected | Keep Coding
π TechByWebCoder
β¨ Topic: Introduction to REST API Development using Flask
βββββββββββββββββββ
π What is Flask?
Flask is a lightweight Python web framework used to build:
β Web applications
β REST APIs
β Backend services
It is simple, flexible, and widely used in Python backend development.
βββββββββββββββββββ
π¦ Install Flask
pip install flask
Import in Python:
from flask import Flask
βββββββββββββββββββ
π₯ Creating First Flask App
from flask import Flask
app = Flask(name)
@app.route("/")
def home():
return "Hello, Flask API!"
app.run(debug=True)
Run the program and open browser:
http://127.0.0.1:5000
βββββββββββββββββββ
π Creating API Endpoint
from flask import Flask, jsonify
app = Flask(name)
@app.route("/api")
def api():
data = {"message": "Hello API"}
return jsonify(data)
app.run(debug=True)
Output:
{ "message": "Hello API" }
βββββββββββββββββββ
πΉ Handling URL Parameters
@app.route("/user/")
def user(name):
return "Hello " + name
Example:
http://127.0.0.1:5000/user/Soham
Output:
Hello Soham
βββββββββββββββββββ
πΉ Handling JSON Request (POST)
from flask import request
@app.route("/data", methods=["POST"])
def receive():
data = request.json
return {"received": data}
βββββββββββββββββββ
π§ Where Flask APIs Are Used?
β Mobile app backends
β Web application backends
β AI model APIs
β Microservices architecture
βββββββββββββββββββ
π Practice Tasks β Day 54
β Install Flask
β Create simple API
β Return JSON response
β Use URL parameter
βββββββββββββββββββ
π― Day 54 Goal
β Understand Flask framework
β Create simple REST API
β Handle requests and responses
βββββββββββββββββββ
π Next Topic β Day 55
π₯ Connecting Flask with Database (SQLite)
β¨ Stay Connected | Keep Coding
π TechByWebCoder
π PYTHON β DAY 55 STUDY MATERIAL
β¨ Topic: Connecting Flask with SQLite Database
βββββββββββββββββββ
π Goal
Build a simple Flask API that stores and retrieves data from SQLite database.
Concepts used:
β Flask API
β SQLite Database
β JSON responses
β CRUD operations
βββββββββββββββββββ
π¦ Import Required Modules
from flask import Flask, request, jsonify
import sqlite3
app = Flask(name)
βββββββββββββββββββ
π Create Database Connection
def get_db():
conn = sqlite3.connect("student.db")
conn.row_factory = sqlite3.Row
return conn
βββββββββββββββββββ
β API: Add Student
@app.route("/add", methods=["POST"])
def add_student():
data = request.json
conn = get_db()
conn.execute(
"INSERT INTO student(name,age) VALUES(?,?)",
(data["name"], data["age"])
)
conn.commit()
conn.close()
return {"message": "Student added"}
βββββββββββββββββββ
π API: Get All Students
@app.route("/students")
def get_students():
conn = get_db()
students = conn.execute(
"SELECT * FROM student"
).fetchall()
conn.close()
return jsonify([dict(row) for row in students])
βββββββββββββββββββ
π API: Get Student by ID
@app.route("/student/int:id")
def get_student(id):
conn = get_db()
student = conn.execute(
"SELECT * FROM student WHERE id=?",
(id,)
).fetchone()
conn.close()
return jsonify(dict(student))
βββββββββββββββββββ
π Run Flask Application
if name == "main":
app.run(debug=True)
βββββββββββββββββββ
π§ What You Learned Today
β Connect Flask with SQLite
β Create REST APIs with database
β Return JSON responses
βββββββββββββββββββ
π Practice Tasks β Day 55
β Create student API
β Insert student data
β Fetch all students
β Fetch student by ID
βββββββββββββββββββ
π― Day 55 Goal
β Build backend API with database
β Perform CRUD using Flask
β Understand backend architecture
βββββββββββββββββββ
π Next Topic β Day 56
π₯ Authentication System in Flask (Login API)
β¨ Stay Connected | Keep Coding
π TechByWebCoder
β¨ Topic: Connecting Flask with SQLite Database
βββββββββββββββββββ
π Goal
Build a simple Flask API that stores and retrieves data from SQLite database.
Concepts used:
β Flask API
β SQLite Database
β JSON responses
β CRUD operations
βββββββββββββββββββ
π¦ Import Required Modules
from flask import Flask, request, jsonify
import sqlite3
app = Flask(name)
βββββββββββββββββββ
π Create Database Connection
def get_db():
conn = sqlite3.connect("student.db")
conn.row_factory = sqlite3.Row
return conn
βββββββββββββββββββ
β API: Add Student
@app.route("/add", methods=["POST"])
def add_student():
data = request.json
conn = get_db()
conn.execute(
"INSERT INTO student(name,age) VALUES(?,?)",
(data["name"], data["age"])
)
conn.commit()
conn.close()
return {"message": "Student added"}
βββββββββββββββββββ
π API: Get All Students
@app.route("/students")
def get_students():
conn = get_db()
students = conn.execute(
"SELECT * FROM student"
).fetchall()
conn.close()
return jsonify([dict(row) for row in students])
βββββββββββββββββββ
π API: Get Student by ID
@app.route("/student/int:id")
def get_student(id):
conn = get_db()
student = conn.execute(
"SELECT * FROM student WHERE id=?",
(id,)
).fetchone()
conn.close()
return jsonify(dict(student))
βββββββββββββββββββ
π Run Flask Application
if name == "main":
app.run(debug=True)
βββββββββββββββββββ
π§ What You Learned Today
β Connect Flask with SQLite
β Create REST APIs with database
β Return JSON responses
βββββββββββββββββββ
π Practice Tasks β Day 55
β Create student API
β Insert student data
β Fetch all students
β Fetch student by ID
βββββββββββββββββββ
π― Day 55 Goal
β Build backend API with database
β Perform CRUD using Flask
β Understand backend architecture
βββββββββββββββββββ
π Next Topic β Day 56
π₯ Authentication System in Flask (Login API)
β¨ Stay Connected | Keep Coding
π TechByWebCoder
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Day 01: Perfect Number in Python
Tutorial Video : - https://youtube.com/shorts/csNv_re63S0
Source Code : - https://github.com/TechbyWebCoder/Python-Numeric-Problem
Follow For More....!!
Tutorial Video : - https://youtube.com/shorts/csNv_re63S0
Source Code : - https://github.com/TechbyWebCoder/Python-Numeric-Problem
Follow For More....!!
Day 02: Strong Number in Python
Tutorial Video : - https://youtube.com/shorts/Mt6pw9fzfXY
Source Code : - https://github.com/TechbyWebCoder/Python-Numeric-Problem
Follow For More....!!
Tutorial Video : - https://youtube.com/shorts/Mt6pw9fzfXY
Source Code : - https://github.com/TechbyWebCoder/Python-Numeric-Problem
Follow For More....!!
Day 03: Armstrong Number in Python
Tutorial Video : - https://youtube.com/shorts/rxB4VKPRx0Q
Source Code : - https://github.com/TechbyWebCoder/Python-Numeric-Problem
Follow For More....!!
Tutorial Video : - https://youtube.com/shorts/rxB4VKPRx0Q
Source Code : - https://github.com/TechbyWebCoder/Python-Numeric-Problem
Follow For More....!!
Day 04: Automorphic Number in Python
Tutorial Video : - https://youtube.com/shorts/HieirMEBFw8
Source Code : - https://github.com/TechbyWebCoder/Python-Numeric-Problem
Follow For More....!!
Tutorial Video : - https://youtube.com/shorts/HieirMEBFw8
Source Code : - https://github.com/TechbyWebCoder/Python-Numeric-Problem
Follow For More....!!
Day 05: Harshad (Niven) Number in Python
Tutorial Video : - https://youtube.com/shorts/sZQSRQyrRtY
Source Code : - https://github.com/TechbyWebCoder/Python-Numeric-Problem
Follow For More....!!
Tutorial Video : - https://youtube.com/shorts/sZQSRQyrRtY
Source Code : - https://github.com/TechbyWebCoder/Python-Numeric-Problem
Follow For More....!!
Day 06: Neon Number in Python
Tutorial Video : - https://youtube.com/shorts/AcCj2GcLWDI
Source Code : - https://github.com/TechbyWebCoder/Python-Numeric-Problem
Follow For More....!!
Tutorial Video : - https://youtube.com/shorts/AcCj2GcLWDI
Source Code : - https://github.com/TechbyWebCoder/Python-Numeric-Problem
Follow For More....!!
Day 07: Sunny Number in Python
Tutorial Video : - https://youtube.com/shorts/gSntjnKlaj8
Source Code : - https://github.com/TechbyWebCoder/Python-Numeric-Problem
Follow For More....!!
Tutorial Video : - https://youtube.com/shorts/gSntjnKlaj8
Source Code : - https://github.com/TechbyWebCoder/Python-Numeric-Problem
Follow For More....!!
Day 08: Spy Number in Python
Tutorial Video : - https://youtube.com/shorts/CMM7FC0O5rg
Source Code : - https://github.com/TechbyWebCoder/Python-Numeric-Problem
Follow For More....!!
Tutorial Video : - https://youtube.com/shorts/CMM7FC0O5rg
Source Code : - https://github.com/TechbyWebCoder/Python-Numeric-Problem
Follow For More....!!
Day 09: Duck Number in Python
Tutorial Video : - https://youtube.com/shorts/jsN7b6MtK3s
Source Code : - https://github.com/TechbyWebCoder/Python-Numeric-Problem
Follow For More....!!
Tutorial Video : - https://youtube.com/shorts/jsN7b6MtK3s
Source Code : - https://github.com/TechbyWebCoder/Python-Numeric-Problem
Follow For More....!!