175 – Split from both sides

The string method split has a counterpart rsplit that starts splitting from the end of the string. If you split without restrictions, they behave the same way:

>>> "This is bananas".split()
['This', 'is', 'bananas']

>>> "This is bananas".rsplit()
['This', 'is', 'bananas']

However, if you specify a value for the parameter maxsplit, then split will find the first splits:

s = "This is bananas"
first, rest = s.split(maxsplit=1)
print(first)  # This
print(rest)  # is bananas

While rsplit will find the last splits:

s = "This is bananas"
rest, last = s.rsplit(maxsplit=1)
print(last)  # bananas
print(rest)  # This is

The string method partition also has a counterpart rpartition that partitions from the right.

These two methods that start operating from the end of the string are useful when you only want the last segment(s) of a string.