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Simple To-Do List

The code is a simple To-Do list application that allows users to add tasks, remove the last task, and quit the program.

Code Block

This script provides a basic command-line interface for managing a To-Do list. Users can add tasks to the list, remove the most recent task, or exit the application. The list of tasks is displayed each time an action is completed. If the list is empty, the program informs the user. The application operates in a loop, continuously offering the user the option to add or remove tasks until they choose to quit.

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Code Analysis

Improving Task Removal:

  • The pop() method removes the last task from the list, which might not be the desired behavior if the user wants to remove a specific task. Instead, provide an option to remove a task by its index.

elif choice == '2':
   print('Removing task')
   if todo_list:
       index = int(input("Enter the task number to remove: ")) - 1
       if 0 <= index < len(todo_list):
           removed_task = todo_list.pop(index)
           print(f"Task '{removed_task}' removed from the ToDo list")
       else:
           print("Invalid task number")
   else:
       print("ToDo List is empty")

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Input Validation:

  • Validate user input to ensure it is a valid number when choosing options or removing tasks.

try:
   choice = int(input('Which one do you choose 1, 2, 3?'))
   if choice not in [1, 2, 3]:
       print("Invalid choice, please choose 1, 2, or 3.")
       continue
except ValueError:
   print("Invalid input, please enter a number.")
   continue

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Task Listing Enhancement:

  • Ensure the to-do list displays correctly when it’s empty and the task numbers start from 1. The current implementation is correct but can be streamlined with consistent formatting and clarity.

if not todo_list:
   print('Your ToDo list is empty')
else:
   print('Your ToDo List:')
   for index, task in enumerate(todo_list, start=1):
       print(f"{index}. {task}")

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Modularize Code:

  • Refactor the code into functions to improve readability and maintainability.

def display_tasks(todo_list):
   if not todo_list:
       print('Your ToDo list is empty')
   else:
       print('Your ToDo List:')
       for index, task in enumerate(todo_list, start=1):
           print(f"{index}. {task}")

def add_task(todo_list):
   new_task = input("Enter the task: ")
   todo_list.append(new_task)
   print(f"Task '{new_task}' added to the ToDo list")

def remove_task(todo_list):
   if todo_list:
       display_tasks(todo_list)
       try:
           index = int(input("Enter the task number to remove: ")) - 1
           if 0 <= index < len(todo_list):
               removed_task = todo_list.pop(index)
               print(f"Task '{removed_task}' removed from the ToDo list")
           else:
               print("Invalid task number")
       except ValueError:
           print("Invalid input, please enter a number.")
   else:
       print("ToDo List is empty")

todo_list = []
while True:
   display_tasks(todo_list)
   print('Options:')
   print('1) Add Task')
   print('2) Remove Task')
   print('3) Quit')

   try:
       choice = int(input('Which one do you choose 1, 2, 3?'))
       if choice == 1:
           add_task(todo_list)
       elif choice == 2:
           remove_task(todo_list)
       elif choice == 3:
           print('Quitting')
           break
       else:
           print("Invalid choice, please choose 1, 2, or 3.")
   except ValueError:
       print("Invalid input, please enter a number.")

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User Feedback:

  • Provide clear feedback when tasks are added or removed, including the updated task list.

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Final Notes:

The code effectively manages a basic to-do list with options to add, remove, and quit. By adding input validation, improving task removal, and modularizing the code, you can enhance the usability and robustness of the application. This approach will make the code easier to understand, maintain, and extend with additional features in the future.

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