| 1 | class ExpenseTracker: |
| 2 | def __init__(self): |
| 3 | self.expenses = {} |
| 4 | self.categories = {} |
| 5 | |
| 6 | def add_expense(self, date, amount, category): |
| 7 | if category not in self.expenses: |
| 8 | self.expenses[category] = [] |
| 9 | self.expenses[category].append((date, amount)) |
| 10 | |
| 11 | def add_category(self, category): |
| 12 | if category not in self.categories: |
| 13 | self.categories[category] = 0 |
| 14 | |
| 15 | def view_expenses(self): |
| 16 | for category, items in self.expenses.items(): |
| 17 | total_amount = sum(amount for _, amount in items) |
| 18 | print(f"{category}: ${total_amount}") |
| 19 | |
| 20 | def view_categories(self): |
| 21 | print("Categories:") |
| 22 | for category in self.expenses.keys(): |
| 23 | print(category) |
| 24 | |
| 25 | # Sample usage |
| 26 | tracker = ExpenseTracker() |