# [Edu-sig] Python 2.0 and teaching precalculus

**Kirby Urner
**
pdx4d@teleport.com

*Sun, 10 Sep 2000 09:07:45 -0700*

>*Here's wiggle():
*>*
*>*def wiggle(function,input,epsilon=1e-10):
*>* """
*>* Accepts a function, value and returns delta f / delta x
*>* for small epsilon (default of 1^-10 may be overridden)
*>* """
*>* return (function(input+epsilon) - function(input))/epsilon
*
Fast reader on comp.lang.python caught the above typo error
in my post (web version was OK).
Of course 1^-10 is simply 1. Now that I stop to cogitate,
I see this could be a real confusion. 1e-10 = 10^-10, just
as 1e2 = 10^2 = 100. Need to remind students that #.###e###
means #.### x 10**###, obviously not #.###**###.
Kirby