Documentation massively links on jsonscheme.IValidator class which is not present in code, also base class of validator is hidden within factory. So I can't create my own custom validator.

Also I have no information about defaults without monkey patching

To extend array type with tuple(#148), we have toto add code like this:

def _add_tuple(types):
    result = dict(types)
    result['array'] = (list, tuple)

class Validator(Draft4Validator):
    DEFAULT_TYPES = _add_tuple(Draft4Validator. DEFAULT_TYPES)