Is THIS a Major Bug in Python?

Python's built-in round() function uses banker's rounding (round half to even), an IEEE standard, rather than the traditional round-half-up method. This means 0.5 rounds to 0, 1.5 rounds to 2, 2.5 rounds to 2, and 3.5 rounds to 4. The rationale is bias reduction in datasets: always rounding .5 up or down introduces a systematic error, while banker's rounding preserves the original sum across large datasets with many .5 values.