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Flask
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#Using Flask, create a basic web application with two routes: The root route (/) should display a welcome message. Another route (/about) should display a short "About Us" message. | |
from flask import Flask | |
app = Flask(__name__) | |
@app.route('/') | |
def home(): | |
return "Welcome to our Flask web application!" | |
@app.route('/about') | |
def about(): | |
return "About Us: We are building awesome web apps with Flask!" | |
if __name__ == '__main__': | |
app.run(debug=True) |
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#Create a Flask application with a route /hello that accepts a name as a query parameter (GET method). Example: visiting /hello?name=Raj should display “Hello, Raj!” on the page. | |
# remember to do http://127.0.0.1:5000/hello?name=Raj | |
from flask import Flask, request | |
app = Flask(__name__) | |
@app.route('/hello') | |
def hello(): | |
name = request.args.get('name', 'Guest') # Default to 'Guest' if no name provided | |
return f"Hello, {name}!" | |
if __name__ == '__main__': | |
app.run(debug=True) |
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#Create a Flask application with a route /form that displays a form to collect user name and age (using GET). When the form is submitted (POST), show a message like: "Thank you!" | |
#app.py | |
from flask import Flask, request, render_template | |
app = Flask(__name__) | |
@app.route('/form', methods=['GET', 'POST']) | |
def form(): | |
if request.method == 'POST': | |
return render_template('thank_you.html') | |
return render_template('form.html') | |
if __name__ == '__main__': | |
app.run(debug=True) | |
#templates/form.html | |
<!doctype html> | |
<html> | |
<head><title>User Form</title></head> | |
<body> | |
<form method="POST"> | |
Name: <input type="text" name="name" required><br> | |
Age: <input type="number" name="age" required><br> | |
<input type="submit" value="Submit"> | |
</form> | |
</body> | |
</html> | |
#templates/thank_you.html | |
<!doctype html> | |
<html> | |
<head><title>Thank You</title></head> | |
<body> | |
<h2>Thank you!</h2> | |
</body> | |
</html> |
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#Create a simple Flask app with a /login route that displays a login form with username and password fields. On submitting (POST), check if the username is admin and password is 1234, then display “Login Successful”. | |
#app.py | |
from flask import Flask, request, render_template | |
app = Flask(__name__) | |
@app.route('/login', methods=['GET', 'POST']) | |
def login(): | |
message = '' | |
if request.method == 'POST': | |
username = request.form.get('username') | |
password = request.form.get('password') | |
if username == 'admin' and password == '1234': | |
message = 'Login Successful' | |
else: | |
message = 'Invalid credentials' | |
return render_template('login.html', message=message) | |
if __name__ == '__main__': | |
app.run(debug=True) | |
#templates/login.html | |
<!doctype html> | |
<html> | |
<head><title>Login</title></head> | |
<body> | |
<h2>Login Form</h2> | |
<form method="POST"> | |
Username: <input type="text" name="username" required><br> | |
Password: <input type="password" name="password" required><br> | |
<input type="submit" value="Login"> | |
</form> | |
<p>{{ message }}</p> | |
</body> | |
</html> | |
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#Create a Flask app with a route /home that renders a static HTML page named home.html using the render_template() function. | |
#app.py | |
from flask import Flask, render_template | |
app = Flask(__name__) | |
@app.route('/home') | |
def home(): | |
return render_template('home.html') | |
if __name__ == '__main__': | |
app.run(debug=True) | |
#templates/home.html | |
<!doctype html> | |
<html> | |
<head> | |
<title>Home Page</title> | |
</head> | |
<body> | |
<h1>Welcome to the Home Page!</h1> | |
<p>This is a static HTML page served by Flask.</p> | |
</body> | |
</html> |
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#Design a Flask application with a route /hello/<name>. Pass the name variable from the route to an HTML template using render_template(). | |
#app.py | |
from flask import Flask, render_template | |
app = Flask(__name__) | |
@app.route('/hello/<name>') | |
def hello(name): | |
return render_template('hello.html', user_name=name) | |
@app.route('/') | |
def index(): | |
return "hello this is the home page just go to /hello/<name> to see the hello page" | |
if __name__ == '__main__': | |
app.run(debug=True) | |
#templates/hello.html | |
<!doctype html> | |
<html> | |
<head> | |
<title>Hello Page</title> | |
</head> | |
<body> | |
<h1>Hello, {{ user_name }}!</h1> | |
<p>Welcome to our Flask app.</p> | |
</body> | |
</html> |
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# Create a Flask app with a route /students that passes a list of student names to an HTML template. Use a for loop in the template to display the list in bullet points. | |
#app.py | |
from flask import Flask, render_template, request | |
app = Flask(__name__) | |
@app.route('/students') | |
def students(): | |
student_list = ["Arnav", "Siddhant", "Pranav Titambe", "Pranav Pol"] | |
return render_template('students.html', students=student_list) | |
if __name__ == '__main__': | |
app.run(debug=True) | |
#templates/students.html | |
<!DOCTYPE html> | |
<html lang="en"> | |
<head> | |
<meta charset="UTF-8"> | |
<meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
<title>students list</title> | |
</head> | |
<body> | |
<h1>Students list</h1> | |
<ul> | |
{% for student in students %} | |
<li>{{student}}</li> | |
{% endfor %} | |
</ul> | |
</body> | |
</html> |
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# Build a Flask app with a route /feedback that displays a form using an HTML template. When the user submits their name and feedback (POST), show the submitted data below the form on the same page. | |
#app.py | |
from flask import Flask, request, render_template | |
app = Flask(__name__) | |
@app.route('/feedback', methods=['GET', 'POST']) | |
def feedback(): | |
name = '' | |
comment = '' | |
if request.method == 'POST': | |
name = request.form.get('name') | |
comment = request.form.get('feedback') | |
return render_template('feedback.html', name=name, comment=comment) | |
if __name__ == '__main__': | |
app.run(debug=True) | |
#templates/feedback.html | |
<!doctype html> | |
<html> | |
<head> | |
<title>Feedback Form</title> | |
</head> | |
<body> | |
<h1>Feedback Form</h1> | |
<form method="POST"> | |
Name: <input type="text" name="name" required><br><br> | |
Feedback:<br> | |
<textarea name="feedback" rows="4" cols="40" required></textarea><br><br> | |
<input type="submit" value="Submit"> | |
</form> | |
{% if name and comment %} | |
<h2>Submitted Feedback</h2> | |
<p><strong>Name:</strong> {{ name }}</p> | |
<p><strong>Feedback:</strong> {{ comment }}</p> | |
{% endif %} | |
</body> | |
</html> |
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