Practice interviews by fixing real bugs, not memorizing answers

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Sample task

This one's a classic float rounding bug

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PythonFintechMedium

calculate_total.py — 1 test failing

1 def calculate_total(items):

2 total = 0

3 for item in items:

4 total += item["price"] * item["quantity"]

5 return total

✗ assert calculate_total([{"price": 19.99, "quantity": 3}]) == 59.97

AssertionError: 59.96999999999999 != 59.97

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