python join documentation code example

Example: join python documentation

>>> ''.join(['A', 'B', 'C'])
'ABC'
>>> ''.join({'A': 0, 'B': 0, 'C': 0}) # note that dicts are unordered
'ACB'
>>> '-'.join(['A', 'B', 'C'])  # '-' string is the seprator
'A-B-C'