o install and set up a Flask app, you'll need to follow these steps. I'll provide a simplified guide to creating a basic Flask app. If you want to create a pop-up in your app, you can include the necessary HTML and JavaScript code within your Flask routes and templates. Here's a general outline:

Step 1: Install Python

Make sure you have Python installed on your computer. If not, download and install it from the official Python website (https://www.python.org/).

Step 2: Install Flask

Open your command prompt or terminal and use pip (Python's package manager) to install Flask:

bash
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pip install Flask
Step 3: Create a Flask App

Create a folder for your Flask app and navigate to it in your terminal.

Step 4: Create a Python File

Inside your app folder, create a Python file (e.g., app.py) to write your Flask application code.

Step 5: Write Your Flask App

In your app.py file, write the code for your Flask application. Here's a basic example:

python
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from flask import Flask, render_template

app = Flask(__name__)

@app.route('/')
def home():
    return render_template('index.html')

if __name__ == '__main__':
    app.run(debug=True)
This code creates a Flask app that serves an HTML file named index.html.

Step 6: Create HTML and JavaScript for the Pop-Up

Inside your app folder, create a folder named templates. Inside the templates folder, create an HTML file (e.g., index.html) where you can include the HTML and JavaScript for your pop-up.

Here's a simplified example of an HTML file with a pop-up:

html
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<!DOCTYPE html>
<html>
<head>
    <title>Flask App with Pop-Up</title>
</head>
<body>
    <h1>Welcome to My Flask App</h1>

    <button onclick="openPopup()">Open Pop-Up</button>

    <div id="popup" style="display: none;">
        <p>This is a pop-up!</p>
        <button onclick="closePopup()">Close</button>
    </div>

    <script>
        function openPopup() {
            document.getElementById('popup').style.display = 'block';
        }

        function closePopup() {
            document.getElementById('popup').style.display = 'none';
        }
    </script>
</body>
</html>
This HTML file includes a button to open a pop-up and JavaScript functions to show and hide the pop-up.

Step 7: Run Your Flask App

In your terminal, navigate to your app folder and run your Flask app by executing:

bash
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python app.py
Your Flask app should now be running. You can access it in your web browser at http://localhost:5000.

That's it! You've created a simple Flask app with a pop-up. You can expand on this foundation to build more complex web applications with Flask.
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