Orders are [city, amount]. Write sales_by_city(orders) returning a dict city → total amount.
sales_by_city([['Pune', 100], ['Delhi', 50], ['Pune', 25]])
→ {'Pune': 125, 'Delhi': 50}sales_by_city([])
→ {}Submit runs 3 tests, including hidden edge cases.
Run your code to see the output here.