from tinydb import TinyDBdb = TinyDB('some-db.json')db.insert({'foo': 'bar'})db.insert({'bar': set([1])})

Traceback (most recent call last):  File "test-tinydb.py", line 6, in <module>    db.insert({'bar': set([1])})  File "/usr/lib/python2.7/site-packages/tinydb/database.py", line 299, in insert    self._write(data)  File "/usr/lib/python2.7/site-packages/tinydb/database.py", line 266, in _write    self._storage.write(values)  File "/usr/lib/python2.7/site-packages/tinydb/database.py", line 45, in write    self._storage.write(data)  File "/usr/lib/python2.7/site-packages/tinydb/storages.py", line 105, in write    json.dump(data, self._handle, **self.kwargs)  File "/usr/lib64/python2.7/json/__init__.py", line 189, in dump    for chunk in iterable:  File "/usr/lib64/python2.7/json/encoder.py", line 434, in _iterencode    for chunk in _iterencode_dict(o, _current_indent_level):  File "/usr/lib64/python2.7/json/encoder.py", line 408, in _iterencode_dict    for chunk in chunks:  File "/usr/lib64/python2.7/json/encoder.py", line 408, in _iterencode_dict    for chunk in chunks:  File "/usr/lib64/python2.7/json/encoder.py", line 408, in _iterencode_dict    for chunk in chunks:  File "/usr/lib64/python2.7/json/encoder.py", line 442, in _iterencode    o = _default(o)  File "/usr/lib64/python2.7/json/encoder.py", line 184, in default    raise TypeError(repr(o) + " is not JSON serializable")TypeError: set([1]) is not JSON serializable