str.rpartition(sep) Split the string at the last occurrence of sep, and return a 3-tuple containing the part before

union(other, ...) set | other | ... Return a new set with elements from the set and all others.

str.isidentifier() Return true if the string is a valid identifier according to the language definition, section Identifiers

str.replace(old, new[, count]) Return a copy of the string with all occurrences of substring old replaced by new

str.islower() Return true if all cased characters [4] in the string are lowercase and there is at least one cased character

tobytes() Return the data in the buffer as a bytestring. This is equivalent to calling the

str.join(iterable) Return a string which is the concatenation of the strings in the iterable

issuperset(other) set >= other Test whether every element in other is in the set.

instance.__class__ The class to which a class instance belongs.

keys() Return a new view of the dictionary’s keys. See the documentation of view objects.