def from_chars(cls, *args):
"""return a new object from pairs of character symbols
works with either multiple arguments, or a single iterable
"""
try:
return cls(Card.from_chars(chars) for chars in args)
except CardCreationError:
try:
return cls(Card.from_chars(chars) for chars in args[0])
except (TypeError, CardCreationError):
pass
raise HandCreationError('invalid card symbols')
