gistfile1.py

#!/usr/bin/env python

from __future__ import division
import math

def myexp(x):
    ''' myexp(x) will compute e^x for any x by measuring the difference in the last 2 terms of the series. '''
    tot = (1 + x)
    n = 1
    while (tot != tot + x):
        n = n + 1
        x = x * (x / n)
        tot = tot + x
    return tot

x = float(raw_input("Evaluate e at x = "))
e = myexp(x)

z = math.exp(x)
diff = z - e

print "Ans: %0.4f" % e
print "Difference: %0.4f" % diff