code:
In [1]: total = 11
In [2]: a, b, c = 3, 3, 5
In [3]: list(map(lambda x: x / total, [a, b, c]))
Out[3]: [0.2727272727272727, 0.2727272727272727, 0.45454545454545453]
In [4]: sum(map(lambda x: Decimal(x / total), [a, b, c]))
Out[4]: Decimal('0.9999999999999999444888487687')
怎么处理最后的占比结果