Interactive Flask Web App for Displaying CSV Data with Dynamic Text Visibility

from flask import Flask, render_template, request
import csv

app = Flask(__name__)

# Global variables to store selected chapter and section
selected_chapter = None
selected_section = None

@app.route('/', methods=['GET', 'POST'])
def index():
    chapters = ['Chapter 1', 'Chapter 2']
    sections = ['Section 1', 'Section 2']
    
    if request.method == 'POST':
        global selected_chapter, selected_section
        selected_chapter = request.form['chapter']
        selected_section = request.form['section']
        
        return render_template('index.html', chapters=chapters, sections=sections, selected_chapter=selected_chapter, selected_section=selected_section)
    
    return render_template('index.html', chapters=chapters, sections=sections)

@app.route('/choose', methods=['POST'])
def choose():
    if selected_chapter and selected_section:
        csv_file = f'Text/{selected_chapter}_{selected_section}.csv'
        
        with open(csv_file, 'r') as file:
            reader = csv.reader(file)
            data = list(reader)
        
        return render_template('index.html', data=data, selected_chapter=selected_chapter, selected_section=selected_section)
    
    return render_template('index.html')

if __name__ == '__main__':
    app.run(debug=True)

This code demonstrates a Python web application built with Flask that provides an interactive way to display data from CSV files.

Features:

1. Dropdown Selection: Users can select a chapter and section from dropdown menus, providing a structured way to navigate content.
2. Dynamic CSV Reading: Upon selection, the app reads data from a corresponding CSV file in the 'Text' folder, dynamically loading the content.
3. Interactive Text Visibility: The application allows for controlled visibility of text within the CSV data. Initially, only the first column is displayed. Users can interact to reveal hidden text in other columns for a limited time.
4. User Input: A text box is provided for user input, enabling interactions like answering questions or providing feedback.
5. Control Buttons: 'Answer' and 'Clear' buttons offer control over the display, revealing answers or resetting the interface.

Explanation:

• The code defines two routes: '/' for the main page with dropdown menus and '/choose' to handle the data display based on user selection.
• Global variables store the selected chapter and section, ensuring data consistency.
• The csv module efficiently reads and parses data from the selected CSV file.
• The render_template function renders the 'index.html' template, passing necessary data for dynamic content display.
• The implementation of interactive text visibility and button functionality would be handled using HTML, CSS, and JavaScript within the 'index.html' template, enhancing user experience.

Note: This code snippet focuses on the backend logic. Frontend development (HTML, CSS, JavaScript) is crucial for creating the interactive elements and visual presentation of the application.