保留两位小数,并做四舍五入处理
>>> a = 12.345
>>> print("%.2f" % a)
12.35
>>>
>>> a = 12.345
>>> round(a, 2)
12.35
>>> from decimal import Decimal
>>> a = 12.345
>>> Decimal(a).quantize(Decimal("0.00"))
Decimal('12.35')
仅保留两位小数,无需四舍五入
>>> a = 12.345
>>> str(a).split('.')[0] + '.' + str(a).split('.')[1][:2]
'12.34'
>>> import re
>>> a = 12.345
>>> re.findall(r"\d{1,}?\.\d{2}", str(a))
['12.34']