Python | Decimal copy _ negative()方法
原文:https://www . geesforgeks . org/python-decimal-copy _ negative-method/
Decimal # copy _ negative():copy _ negative()是一个 Decimal 类方法，返回 Decimal 值的否定。
语法:decimal . copy _ negative()
参数:十进制值
返回:十进制值的否定
代码# 1:copy _ negative()方法示例
# Python Program explaining
# copy_negate() 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.copy_negate() method
print ("\n\nDecimal a with copy_negate() method : ", a.copy_negate())
print ("Decimal b with copy_negate() method : ", b.copy_negate())
输出:
Decimal value a : -1
Decimal value b : 0.142857
Decimal a with copy_negate() method : 1
Decimal b with copy_negate() method : -0.142857
代码# 2:copy _ negative()方法示例
# Python Program explaining
# copy_negate() 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.copy_negate() method
print ("\n\nDecimal a with copy_negate() method : ", a.copy_negate())
print ("Decimal b with copy_negate() method : ", b.copy_negate())
输出:
Decimal value a : -3.14
Decimal value b : 3.21E+7
Decimal a with copy_negate() method : 3.14
Decimal b with copy_negate() method : -3.21E+7
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