Python|十进制 compare() 方法

Decimal#compare() : compare()是一个 Decimal 类方法，用于比较两个 Decimal 值。

Syntax: Decimal.compare()

Parameter: Decimal values

Return:
1 – if a > b
-1 – if a < b
0 – if a = b

代码 #1：compare() 方法的示例

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

输出 ：

Decimal value a :  -1
Decimal value b :  0.142857


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

代码 #2：compare() 方法的示例

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

输出 ：

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


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