16_tuples.py

# Python Tuple is a collection of objects separated by commas. A tuple is similar to a 
# Python list in terms of indexing, nested objects, and repetition but the main difference
# between both is Python tuple is immutable, unlike the Python list which is mutable.

things = 'pen', 'pencil', 'water bottle', 'charger', 'phone', 'web cam'
print(type(things))   # <class 'tuple'>
print(things[0])      # pen
print(things[3:6])    # ('charger', 'phone', 'web cam')
print(things[::-1])   # ('web cam', 'phone', 'charger', 'water bottle', 'pencil', 'pen')

if 'pen' in things:
    print('exist')

for item in things:
    print(item)

print(len(things))  # 6

mega = ([2,3,4],[6,8,9,5])
print(mega[0])  # [2, 3, 4]
# mega[0] = [6,7,8]  TypeError: 'tuple' object does not support item assignment
mega[0][1] = 666  # ([2, 666, 4], [6, 8, 9, 5])
print(mega)