__init__.py 文件源码

def _json_default_compat(obj):
    classname = type(obj).__name__
    handlers = {
        'datetime': methodcaller('isoformat'),
        'date': methodcaller('isoformat'),
        'time': methodcaller('isoformat'),
        'timedelta': _timedelta_total_seconds,
        'set': list,
        'frozenset': list,
        'complex': partial(getattrs, attrs=['real', 'imag']),
        'Fraction': partial(getattrs, attrs=['numerator', 'denominator']),
        'UUID': str
    }
    if classname in handlers:
        return handlers[classname](obj)
    raise TypeError(repr(obj) + " is not JSON serializable")