Python |十进制量化()方法
原文:https://www . geesforgeks . org/python-decimal-quantize-method/
Decimal # quantize():quantize()是一个 Decimal 类方法，它返回一个等于第一个十进制值(四舍五入)的值，该值具有第二个十进制值的指数。
语法:十进制.量化()
参数:十进制值
返回:等于第一个十进制值(四舍五入)的值，其指数为第二个十进制值。
代码#1:量化()方法示例
# Python Program explaining
# quantize() method
# loading decimal library
from decimal import *
# Initializing a decimal value
a = Decimal(-1)
b = Decimal('0.142857')
# printing Decimal values
print ("Decimal value a : ", a)
print ("Decimal value b : ", b)
# Using Decimal.quantize() method
print ("\n\nDecimal a with quantize() method : ", a.quantize(b))
print ("Decimal b with quantize() method : ", b.quantize(b))
输出:
Decimal value a : -1
Decimal value b : 0.142857
Decimal a with quantize() method : -1.000000
Decimal b with quantize() method : 0.142857
代码#2:量化()方法示例
# Python Program explaining
# quantize() method
# loading decimal library
from decimal import *
# Initializing a decimal value
a = Decimal('-3.14')
b = Decimal('321e + 5')
# printing Decimal values
print ("Decimal value a : ", a)
print ("Decimal value b : ", b)
# Using Decimal.quantize() method
print ("\n\nDecimal a with quantize() method : ", a.quantize(b))
print ("Decimal b with quantize() method : ", b.quantize(b))
输出:
Decimal value a : -3.14
Decimal value b : 3.21E+7
Decimal a with quantize() method : -0E+5
Decimal b with quantize() method : 3.21E+7
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