Create todo.py

Author: danglinhanh

todo.py

@@ -0,0 +1,62 @@
+import json
+import os
+import sys
+
+TASKS_FILE = "tasks.json"
+
+def load_tasks():
+    if not os.path.exists(TASKS_FILE):
+        return []
+    with open(TASKS_FILE, "r") as f:
+        return json.load(f)
+
+def save_tasks(tasks):
+    with open(TASKS_FILE, "w") as f:
+        json.dump(tasks, f, indent=4)
+
+def add_task(description):
+    tasks = load_tasks()
+    tasks.append({"task": description})
+    save_tasks(tasks)
+    print(f"Added task: {description}")
+
+def list_tasks():
+    tasks = load_tasks()
+    if not tasks:
+        print("No tasks found.")
+    else:
+        for i, task in enumerate(tasks, 1):
+            print(f"{i}. {task['task']}")
+
+def remove_task(index):
+    tasks = load_tasks()
+    if 1 <= index <= len(tasks):
+        removed = tasks.pop(index - 1)
+        save_tasks(tasks)
+        print(f"Removed task: {removed['task']}")
+    else:
+        print("Invalid task number.")
+
+def show_help():
+    print("To-Do List Manager")
+    print("Usage:")
+    print("  python todo.py add 'Task description'")
+    print("  python todo.py list")
+    print("  python todo.py remove [task number]")
+
+if __name__ == "__main__":
+    if len(sys.argv) < 2:
+        show_help()
+    else:
+        command = sys.argv[1]
+        if command == "add" and len(sys.argv) >= 3:
+            add_task(" ".join(sys.argv[2:]))
+        elif command == "list":
+            list_tasks()
+        elif command == "remove" and len(sys.argv) == 3:
+            try:
+                remove_task(int(sys.argv[2]))
+            except ValueError:
+                print("Please provide a valid task number.")
+        else:
+            show_help()