Lists and tuples

python

amounts = [499, 1299, 250]

amounts.append(799)

print(amounts[0])        # first item

print(amounts[-1])       # last item

print(amounts[1:3])      # a slice

print(len(amounts), sum(amounts))

location = (12.97, 77.59)   # a tuple: lat, lon

OUTPUT

499 799 [1299, 250] 4 2847

Indexes start at 0. Negative indexes count back from the end. A slice [a:b] includes position a and stops just before b.

A tuple works like a list you can't change. Use one when values belong together and shouldn't be edited, like a coordinate pair.