"""
A simple task management system for demonstration purposes
"""
class Task:
def __init__(self, id, title, description=None, status="pending"):
self.id = id
self.title = title
self.description = description
self.status = status
def mark_complete(self):
self.status = "completed"
def mark_in_progress(self):
self.status = "in_progress"
def __str__(self):
return f"Task {self.id}: {self.title} ({self.status})"
class TaskManager:
def __init__(self):
self.tasks = {}
self.next_id = 1
def add_task(self, title, description=None):
task = Task(self.next_id, title, description)
self.tasks[self.next_id] = task
self.next_id += 1
return task.id
def get_task(self, task_id):
if task_id in self.tasks:
return self.tasks[task_id]
print(f"Task {task_id} not found")
return None
def update_task(self, task_id, title=None, description=None, status=None):
task = self.get_task(task_id)
if not task:
return False
if title:
task.title = title
if description:
task.description = description
if status:
task.status = status
return True
def delete_task(self, task_id):
if task_id in self.tasks:
del self.tasks[task_id]
return True
print(f"Task {task_id} not found")
return False
def list_tasks(self, status=None):
if status:
return [task for task in self.tasks.values() if task.status == status]
return list(self.tasks.values())
def summary(self):
statuses = {}
for task in self.tasks.values():
if task.status in statuses:
statuses[task.status] += 1
else:
statuses[task.status] = 1
return {
"total": len(self.tasks),
"by_status": statuses
}
# Example usage
if __name__ == "__main__":
manager = TaskManager()
# Add some tasks
task1_id = manager.add_task("Implement login functionality")
task2_id = manager.add_task("Fix navigation bug", "Users report the back button not working")
task3_id = manager.add_task("Update documentation")
# Update task status
manager.update_task(task1_id, status="in_progress")
manager.update_task(task2_id, status="completed")
# Print tasks
for task in manager.list_tasks():
print(task)
# Print summary
print("\nSummary:")
summary = manager.summary()
print(f"Total tasks: {summary['total']}")
for status, count in summary['by_status'].items():
print(f"{status}: {count}")
