Python|十进制 next_minus() 方法

Decimal#next_minus() ：next_minus()是一个 Decimal 类方法，它返回小于 Decimal 值的最大可表示数字。

Syntax: Decimal.next_minus()

Parameter: Decimal values

Return: the largest representable number smaller than the Decimal value.

代码 #1：next_minus() 方法的示例

# Python Program explaining 
# next_minus() 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.next_minus() method
print ("\n\nDecimal a with next_minus() method : ", a.next_minus())
  
print ("Decimal a with next_minus() method : ", a.next_minus())
  
print ("Decimal b with next_minus() method : ", b.next_minus())

输出 ：

Decimal value a :  -1
Decimal value b :  0.142857


Decimal a with next_minus() method :  -1.000000000000000000000000001
Decimal a with next_minus() method :  -1.000000000000000000000000001
Decimal b with next_minus() method :  0.1428569999999999999999999999

代码 #2：next_minus() 方法的示例

# Python Program explaining 
# next_minus() 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.next_minus() method
print ("\n\nDecimal a with next_minus() method : ", a.next_minus())
  
print ("Decimal a with next_minus() method : ", a.next_minus())
  
print ("Decimal b with next_minus() method : ", b.next_minus())

输出 ：

Decimal value a :  -3.14
Decimal value b :  3.21E+7


Decimal a with next_minus() method :  -3.140000000000000000000000001
Decimal a with next_minus() method :  -3.140000000000000000000000001
Decimal b with next_minus() method :  32099999.99999999999999999999