str.split

Return a list of the substrings in the string, using sep as the separator string.

  sep
    The separator used to split the string.

    When set to None (the default value), will split on any
    whitespace character (including \n \r \t \f and spaces) and
    will discard empty strings from the result.
  maxsplit
    Maximum number of splits.
    -1 (the default value) means no limit.

Splitting starts at the front of the string and works to the end.

Note, str.split() is mainly useful for data that has been
intentionally delimited.  With natural text that includes
punctuation, consider using the regular expression module.