Decimal＃is_nan()：is_nan()是Decimal類方法，它檢查Decimal值是否為NaN值。
用法：Decimal.is_nan()
參數：十進製值
返回：true –如果小數值為NaN值；否則為假
代碼1：is_nan()方法示例
# Python Program explaining
# is_nan() 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_nan() method
print ("\n\nDecimal a with is_nan() method : ", a.is_nan())
print ("Decimal b with is_nan() method : ", b.is_nan())輸出：
Decimal value a : -1 Decimal value b : NaN Decimal a with is_nan() method : False Decimal b with is_nan() method : True
代碼2：is_nan()方法的示例
# Python Program explaining
# is_nan() 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_nan() method
print ("\n\nDecimal a with is_nan() method : ", a.is_nan())
print ("Decimal b with is_nan() method : ", b.is_nan())輸出：
Decimal value a : -3.14 Decimal value b : 3.21E+7 Decimal a with is_nan() method : False Decimal b with is_nan() method : False
相關用法
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