Python|十进制 compare_signal() 方法

Decimal#compare_signal() : compare_signal()是一个 Decimal 类方法，它比较两个 Decimal 值，但 NaN 值除外。

Syntax: Decimal.compare_signal()
Parameter: Decimal values
Return: 
1 – if a > b 
-1 – if a < b 
0 – if a = b

代码 #1：compare_signal() 方法的示例

Python3

# Python Program explaining
# compare_signal() method
 
# loading decimal library
from decimal import *
 
 
# Initializing a decimal value
a = Decimal('0.142857')
 
b = Decimal(-1)
 
 
# printing Decimal values
print ("Decimal value a : ", a)
print ("Decimal value b : ", b)
 
 
# Using Decimal.compare_signal() method
print ("\n\nDecimal a with compare_signal() method : ", a.compare_signal(a))
 
print ("Decimal a with compare_signal() method : ", a.compare_signal(b))
 
print ("Decimal b with compare_signal() method : ", b.compare_signal(a))

输出 ：

Decimal value a :  0.142857
Decimal value b :  -1


Decimal a with compare_signal() method :  0
Decimal a with compare_signal() method :  1
Decimal b with compare_signal() method :  -1

代码 #2：compare_signal() 方法的示例

Python3

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

输出 ：

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


Decimal a with compare_signal() method :  0
Decimal a with compare_signal() method :  -1
Decimal b with compare_signal() method :  1