How do I find out how many objects are in a list

basically what the title says. I want to be able to find out how many objects a list contains. Maybe my Google-fu is failing me or my termin开发者_如何学编程ology is wrong.

len(s)

Return the length (the number of items) of an object. The argument may be a sequence (string, tuple or list) or a mapping (dictionary).

>>> l = [1, 2, 3]
>>> len(l)
3

Check out the len built-in function:

len(someList)

http://docs.python.org/library/functions.html#len

 a = ['1', '2', '3']
 print len(a)

This wiil print:

3