python中decimal用法_Python Decimal is_qnan()用法及代码示例

Decimal＃is_qnan()：is_qnan()是一种Decimal类方法，它检查Decimal值是否完全是NaN值。

用法：Decimal.is_qnan()

参数：十进制值

返回：true –如果Decimal值非常是NaN值；否则为假

代码1：is_qnan()方法示例

# Python Program explaining

# is_qnan() method

# loading decimal library

from decimal import *

# Initializing a decimal value

a = Decimal(-1)

b = Decimal('nan')

# printing Decimal values

print ("Decimal value a : ", a)

print ("Decimal value b : ", b)

# Using Decimal.is_qnan() method

print ("\n\nDecimal a with is_qnan() method : ", a.is_qnan())

print ("Decimal b with is_qnan() method : ", b.is_qnan())

输出：

Decimal value a : -1

Decimal value b : NaN

Decimal a with is_qnan() method : False

Decimal b with is_qnan() method : True

代码2：is_qnan()方法的示例

# Python Program explaining

# is_qnan() 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.is_qnan() method

print ("\n\nDecimal a with is_qnan() method : ", a.is_qnan())

print ("Decimal b with is_qnan() method : ", b.is_qnan())

输出：

Decimal value a : -3.14

Decimal value b : 3.21E+7

Decimal a with is_qnan() method : False

Decimal b with is_qnan() method : False