[Tutor] List exercise

[Larry Holish]

On Fri, Feb 07, 2003 at 08:30:42PM +0800, Anwar.Lorenzo@gmx.net wrote:
> Hi
> I'm trying to solve the exercise:
> 
> As an exercise, write a loop that traverses the previous list 
> (['spam!', 1, ['Brie', 'Roquefort', 'Pol le Veq'], [1, 2, 3]]) and 
> prints the length of each element. What happens if you send an 
> integer to len? (exercise from 8.3)
> 
> from the ebook How To Think Like A Computer Scientist: Learning with 
> Python.
> 
> I've coded a function to solve this but it doesn't seem to work. IDLE 
> 
> just hangs when I execute this function.
> 
> Here's my solution:
> 
> def exerSize():
> 	exer = ['spam!', 1, ['Brie', 'Roquefort', 'Pol le Veq'], [1, 2, 3]]
> 	i = 0
> 	while i < len(exer):
> 		len(exer[i])
> 	i = i + 1

The type() builtin may also be useful for this problem:

import types
if type(mylist) == types.ListType:
   print 'mylist is a list'

-- 
Larry Holish
<ljholish@speakeasy.net>