将微秒格式化为两位小数（实际上是将微秒转换为数十微秒） [英] Formatting microseconds to two decimal places (in fact converting microseconds into tens of microseconds)

问题描述

我正在使用以下命令打印时间戳记：

I am using the following to print out timestamps:

strftime('%d-%m-%Y %H:%M:%S.%f')

但是我想将微秒四舍五入到小数点后两位而不是打印到小数点后六位。有没有一种简单的方法可以实现此目的，而不是将所有时间元素都拆包，将微秒格式化并四舍五入为小数点后两位和格式化新的打印字符串？

However I want to round the microseconds to two decimal places rather than print out to six decimal places. Is there an easier way to achieve this rather than 'unpacking' all the time elements, formatting and rounding the microseconds to 2 decimals, and formatting a new 'print string'?

推荐答案

decimal_places = 2
ndigits = decimal_places - 6
assert ndigits < 0
d = d.replace(microsecond=round(d.microsecond, ndigits))
print(d.strftime('%d-%m-%Y %H:%M:%S.%f')[:ndigits])
# -> 2014-10-27 11:59:53.87

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