Python 2.5 Natural Logarithm

[system]

Is ln() function available in Python 2.5 ?
( works fine in Python 3.1.2 and 2.7.2 )

Following piece of code gives NZEC on SPOJ when submitted using Python 2.5

import sys
from decimal import *
getcontext().prec = 115
lt = Decimal('10').ln()

Problem : spoj.pl/problems/CALCULAT/
Solved it using Python 3.1.2.

[numerix]

Is ln() function available in Python 2.5 ?

ln() method of Decimal-objects was new in Python 2.6.

[system]

Thanks numerix.