a slicing description in Python with a simple examples

slicing.py

# a list from 0 to 6
piano_keys = ['a', 'b', 'c', 'd', 'e', 'f', 'g']

print(piano_keys[1:5])
# will print from position 1 to the position 5
# ['b', 'c', 'd', 'e']

print(piano_keys[1:5:2])
# will print from position 1 to the position 5
# it will skip the first one after position 1 and print the second one only one time
#  ['b', 'd']

print(piano_keys[1:])
# will print from position 1 to the end
# ['b', 'c', 'd', 'e', 'f', 'g']

print(piano_keys[:5])
# will print from the start to position 5
#  ['a', 'b', 'c', 'd', 'e']

print(piano_keys[::2])
# it will skip the first one and print the second one until the list ends
#  ['a', 'c', 'e', 'g']

print(piano_keys[::-1])
# it will reverse the list
#  ['g', 'f', 'e', 'd', 'c', 'b', 'a']

# a slicing works with tuples also
# a tuples from 0 to 6
piano_keys_in_tuples = ('a', 'b', 'c', 'd', 'e', 'f', 'g')
print(piano_keys_in_tuples[::-1])
# it will reverse the list
#  ('g', 'f', 'e', 'd', 'c', 'b', 'a')