Rounding half to even (bankers’ rounding) is when a number is exactly halfway between two integers, it is rounded to the nearest even integer. This technique is useful since it can help minimize cumulative rounding errors. Round to 2 decimal places using string formatting techniques String ...
ROUND_CEILING: Always round towards positive infinity. With the decimal module, you can round numbers to the desired precision using the .quantize() method. In the example below, the ROUND_UP method has been used to round up the decimal to the nearest integer away from zero. You can achiev...
round()函数可以接受两个参数,第一个参数是要进行截断的浮点数,第二个参数是要保留的小数位数。为了截断浮点数后面的小数,可以将小数部分与整数部分相加后取整数部分。具体实现如下: 代码语言:txt 复制 import math def truncate_float(num, decimal_places): integer_part = int(num) # 获取整数部分 decimal...
>>>TWOPLACES = Decimal(10) ** -2 # same as Decimal('0.01') >>># Round to two places >>>Decimal('3.214').quantize(TWOPLACES) Decimal('3.21') >>># Validate that a number does not exceed two places >>>Decimal('3.21').quantize(TWOPLACES, context=Context(traps=[Inexact])) Decimal...
>>> round(2.65, 1.4) Traceback (most recent call last): File "<pyshell#0>", line 1, in <module> round(2.65, 1.4) TypeError: 'float' object cannot be interpreted as an integer 有时round()得不到完全正确的答案:>>> # Expected value: 2.68 >>> round(2.675, 2) 2.67 2.675是一个...
此格式中的 f 表示浮点值, .2 指定该值必须有两位小数。 句法 "{:0.2f}".format(number) Python Django round to two decimal places view-format() function Django round to two decimal places view-format() function 阅读: Python 过滤器不在 Django 中 Python Django 四舍五入到两位小数视图- %格式...
%和 // 运算符实现了 remainder 和 divide-integer 操作(分别),如规范中所述。十进制对象通常不能与浮点数或 fractions.Fraction 实例在算术运算中结合使用:例如,尝试将 Decimal 加到 float ,将引发 TypeError。 但是,可以使用 Python 的比较运算符来比较 Decimal 实例 x 和另一个数字 y 。 这样可以避免在对...
6、考虑使用decimal模块:如果你需要更精确的控制或更可靠的舍入行为,可以考虑使用Python的decimal模块,这个模块提供了Decimal类,用于高精度的十进制数运算和舍入。 7、了解Python版本之间的差异:不同版本的Python可能对round()函数的行为有所不同,特别是Python 2和Python 3在舍入到偶数的方式上有所不同,确保你了解...
round(10):rounds the integer to10 round(10.7):rounds the float10.7to nearest integer,11. round(5.5):rounds the float5.5to6. Example 2: Round a number to the given number of decimal places print(round(2.665,2))print(round(2.675,2)) ...
def__round__(self,ndigits:Integral=None):"""Rounds self to ndigits decimal places,defaulting to0.If ndigits is omitted or None,returns an Integral,otherwise returns a Real,preferablyofthe same typeasself.Types may choose which direction to round half.For ...