How does python output a value according to the number of digits after the decimal point?

This article mainly introduces the relevant knowledge of "python how to output a certain value according to the number of digits of value precision after the decimal point." Xiaobian shows you the operation process through actual cases. The operation method is simple and fast and practical. I hope this article "python how to output a certain value according to the number of digits of value precision after the decimal point" can help you solve the problem.

import mathdef round(number, ndigits=0): e = 10**ndigits return math.floor(number*e+0.5)/efor i in range(10): print(i, round(3.141592653, i))

from _pydecimal import Decimal, Context, ROUND_HALF_UPprint(Context(prec=3, rounding=ROUND_HALF_UP).create_decimal('1.325'))

def round_up(value):# Replace the built-in round function to retain the precision of two decimal places return round(value *100) / 100.0print(round(1.4))print(round(1.5))print(round(1.5, 1))print(round(1.5, 2))print(round_up(1.115))print(round_up(1.125))print(Decimal(3.14159))

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