Personal Task Manager in Python using a command-line interface and file I/O for data persistenceCreate O for data persistence

Personal Task Manager in Python using a command-line interface and file I/O for data persistence

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+import json
+import os
+from datetime import datetime
+
+# Function to load tasks from the file
+def load_tasks():
+    if os.path.exists("tasks.json"):
+        with open("tasks.json", "r") as file:
+            return json.load(file)
+    else:
+        return []
+
+# Function to save tasks to the file
+def save_tasks(tasks):
+    with open("tasks.json", "w") as file:
+        json.dump(tasks, file, indent=4)
+
+# Function to display all tasks
+def display_tasks(tasks):
+    print("All Tasks:")
+    if tasks:
+        for index, task in enumerate(tasks, start=1):
+            print(f"{index}. {task['title']} - {task['description']} - Due: {task['due_date']} - Status: {task['status']}")
+    else:
+        print("No tasks found.")
+
+# Function to add a new task
+def add_task(tasks):
+    title = input("Enter task title: ")
+    description = input("Enter task description: ")
+    due_date = input("Enter due date (YYYY-MM-DD): ")
+    status = "Pending"
+    tasks.append({"title": title, "description": description, "due_date": due_date, "status": status})
+    save_tasks(tasks)
+    print("Task added successfully.")
+
+# Function to update a task
+def update_task(tasks):
+    display_tasks(tasks)
+    try:
+        index = int(input("Enter task number to update: ")) - 1
+        if 0 <= index < len(tasks):
+            tasks[index]["title"] = input("Enter new title (leave blank to keep existing): ") or tasks[index]["title"]
+            tasks[index]["description"] = input("Enter new description (leave blank to keep existing): ") or tasks[index]["description"]
+            tasks[index]["due_date"] = input("Enter new due date (YYYY-MM-DD) (leave blank to keep existing): ") or tasks[index]["due_date"]
+            tasks[index]["status"] = input("Enter new status (leave blank to keep existing): ") or tasks[index]["status"]
+            save_tasks(tasks)
+            print("Task updated successfully.")
+        else:
+            print("Invalid task number.")
+    except ValueError:
+        print("Invalid input. Please enter a number.")
+
+# Function to delete a task
+def delete_task(tasks):
+    display_tasks(tasks)
+    try:
+        index = int(input("Enter task number to delete: ")) - 1
+        if 0 <= index < len(tasks):
+            del tasks[index]
+            save_tasks(tasks)
+            print("Task deleted successfully.")
+        else:
+            print("Invalid task number.")
+    except ValueError:
+        print("Invalid input. Please enter a number.")
+
+# Main function
+def main():
+    tasks = load_tasks()
+    while True:
+        print("\n===== Personal Task Manager =====")
+        print("1. View all tasks")
+        print("2. Add a new task")
+        print("3. Update a task")
+        print("4. Delete a task")
+        print("5. Exit")
+        choice = input("Enter your choice: ")
+        if choice == "1":
+            display_tasks(tasks)
+        elif choice == "2":
+            add_task(tasks)
+        elif choice == "3":
+            update_task(tasks)
+        elif choice == "4":
+            delete_task(tasks)
+        elif choice == "5":
+            print("Exiting...")
+            break
+        else:
+            print("Invalid choice. Please try again.")
+
+if __name__ == "__main__":
+    main()