Question

Possible Duplicate:
good primer for python slice notation

I have this Python code; items is a list of tuples:

# Print the first 20
for item in items[:20]:
    print item[0], item[1]

It prints the first twenty elements of the list. If the list has fewer than twenty elements, it still works, but I don’t understand why. How do I interpret it?

Answer 1

If the passed value exceeds the number of list elements, slice is limited by the length of the list.

l = range(1,2)
l[:10] == l