'''
    lists.py -- simple samples of a few list and tuple-related operations

    Jeff Ondich, 24 October 2006
    Tianna Avery, November 2018, updated for Python 3

    Read, predict the output, experiment.  Note that there's a crash in
    the code as it stands.  Why does it crash?  Comment out the offending
    line once you understand why it's offensive.
'''

print('=============== initializing and iterating through a simple list ==============')
some_list = ['moose', 'emu', 'goat', 'squid']

for item in some_list:
    print(item)
print()


print('=============== "slicing" a list ==============')
some_list = ['moose', 17, 'emu', 'goat', 'squid']

print('some_list --', some_list)
print('some_list[2:3] --', some_list[2:3])
print('some_list[2:] --', some_list[2:])
print()

# Note the difference between ['ant'] and 'ant' in this context
some_list[2:4] = ['ant']
print('some_list --', some_list)
some_list[2:4] = 'ant'
print('some_list --', some_list)
print()

some_list.append('cow')
some_list.extend(['kiwi'])
print('some_list --', some_list)
print()

print('=============== tuples: read-only lists ==============')
some_tuple = ('dog', 23, 'cat')
for thing in some_tuple:
    print(thing)

# This will crash.
print('Try to add to a tuple...')
some_tuple.append('gerbil')
print()


print('=============== more list operations ==============')
# Go to https://docs.python.org/3/tutorial/datastructures.html
# and play around with the various list operations.