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Python round minutes to the nearest quarter hour
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| def round_to_nearest_quarter_hour(minutes, base=15): | |
| """ | |
| Input: A value in minutes. | |
| Return: An integer rounded to the nearest quarter-hour (0, 15, 30, 45) based on the base interval, | |
| with special handling to ensure rounding from 0 up to 7 goes to 0 and 8 to 15 round to 15 | |
| Example round_to_nearest_quarter_hour(0) rounds to 0 | |
| round_to_nearest_quarter_hour(7) rounds to 0 | |
| round_to_nearest_quarter_hour(8) rounds to 15 | |
| round_to_nearest_quarter_hour(22) rounds to 15 | |
| round_to_nearest_quarter_hour(23) rounds to 30 | |
| """ | |
| # Calculate how far into the current quarter we are | |
| fraction = minutes % base | |
| if fraction == 0: | |
| return minutes # Exactly on a quarter hour | |
| elif fraction < (base / 2): | |
| # If before the halfway point, round down | |
| rounded = minutes - fraction | |
| else: | |
| # If at or past the halfway point, round up | |
| rounded = minutes + (base - fraction) | |
| # Ensure the result is always within the hour range | |
| return int(rounded) % 60 | |
| def test_round_to_nearest_quarter_hour(): | |
| # Test rounding down to the previous quarter | |
| assert round_to_nearest_quarter_hour(1) == 0, "Failed on rounding down to 0" | |
| assert round_to_nearest_quarter_hour(7) == 0, "Failed on rounding down to 0" | |
| assert round_to_nearest_quarter_hour(8) == 15, "Failed on rounding up to 15" | |
| # Test rounding up to the next quarter | |
| assert round_to_nearest_quarter_hour(16) == 15, "Failed on rounding down to 15" | |
| assert round_to_nearest_quarter_hour(22) == 15, "Failed on rounding down to 15" | |
| assert round_to_nearest_quarter_hour(23) == 30, "Failed on rounding up to 30" | |
| # Test on exact quarters | |
| assert round_to_nearest_quarter_hour(15) == 15, "Failed on exact 15" | |
| assert round_to_nearest_quarter_hour(30) == 30, "Failed on exact 30" | |
| assert round_to_nearest_quarter_hour(45) == 45, "Failed on exact 45" | |
| assert round_to_nearest_quarter_hour(52) == 45, "Failed on exact 45" | |
| # Test rounding across hour boundaries | |
| assert round_to_nearest_quarter_hour(53) == 0, "Failed on rounding up to 0" | |
| assert round_to_nearest_quarter_hour(59) == 0, "Failed on rounding up to 0" | |
| assert round_to_nearest_quarter_hour(0) == 0, "Failed on rounding up to 0" | |
| print("All tests passed.") | |
| test_round_to_nearest_quarter_hour() |
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Updated the function and included some tests.