python中ln怎么写_PythonDecimalln（）⽤法及代码⽰例Decimal＃ln()：ln()是⼀个Decimal类⽅法，它返回Decimal值的⾃然(对数e)对数。
⽤法：Decimal.ln()
参数：⼗进制值
返回：⼗进制值的⾃然(以e为底)对数。
代码1：ln()⽅法⽰例
# Python Program explaining
# ln() method
# loading decimal library
from decimal import *
# Initializing a decimal value
a = Decimal('.9932')
b = Decimal('0.142857')
# printing Decimal values
print ("Decimal value a : ", a)
print ("Decimal value b : ", b)
# Using Decimal.ln() method
print ("\n\nDecimal a with ln() method : ", a.ln())
print ("Decimal b with ln() method : ", b.ln())
输出：
python新手代码及作用Decimal value a : 0.9932
Decimal value b : 0.142857
Decimal a with ln() method : -0.006823225348125508334064182053
Decimal b with ln() method : -1.945911149055813305438686327
代码2：ln()⽅法的⽰例
# Python Program explaining
# ln() 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.ln() method
print ("\n\nDecimal a with ln() method : ", a.ln())
print ("Decimal b with ln() method : ", b.ln())
输出：
Decimal value a : 3.14
Decimal value b : 3.21E+7
Decimal a with ln() method : 1.144222799920161998805694448 Decimal b with ln() method : 17.28436658810024428478960133

版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198，我们将在24小时内删除。