greg.ewing at canterbury.ac.nz
Mon Oct 20 23:54:55 CEST 2014
> Say I want a
> Grocery list and it will have a maximum size of 50 items.
In Python it's actually easier to deal with variable-sized
lists having no maximum size. Instead of pre-creating a list
of a given size, just start with an empty list and append
things to it.
Unless there's some external reason for a size limit (e.g.
you can't fit more than 50 items in your shopping bag)
there's no need to impose limit at all. You should
certainly start without a limit and only add it later
Some things to get you started:
items =  # Start with an empty list
items.append("cheese") # Add some items to it
for item in items: # Process the items
If you really need to limit the number of items, you
can do something like this:
if len(items) < 50:
raise Exception("Shopping list is full")
More information about the Python-list