Михаил Авраменко, 441 группа AbsoluteMeta 10190			action22k AbsoluteMeta 10027
t	1	from inspect import getfullargspec	t	1	from inspect import getfullargspec
	2			2
	3	class Absolute(type):		3	class Absolute(type):
	4			4
	5	def __new__(mcls, cls_name, bases_tuple, cls_dict, **kwargs):		5	def __new__(mcls, cls_name, bases_tuple, cls_dict, **kwargs):
	6	attr_w = kwargs.get('width', 'width')		6	attr_w = kwargs.get('width', 'width')
	7	attr_h = kwargs.get('height', 'height')		7	attr_h = kwargs.get('height', 'height')
	8			8
	9	def is_paramless_method(func):		9	def is_paramless_method(func):
	10	if not callable(func):		10	if not callable(func):
	11	return False		11	return False
	12	try:		12	try:
	13	args = getfullargspec(func).args		13	args = getfullargspec(func).args
	14	return len(args) == 1		14	return len(args) == 1
	15	except TypeError:		15	except TypeError:
	16	return False		16	return False
	17	orig_abs = cls_dict.get('abs')		17	orig_abs = cls_dict.get('abs')
	18	orig_len = cls_dict.get('__len__')		18	orig_len = cls_dict.get('__len__')
	19	orig_w = cls_dict.get(attr_w)		19	orig_w = cls_dict.get(attr_w)
	20	orig_h = cls_dict.get(attr_h)		20	orig_h = cls_dict.get(attr_h)
	21	if '__abs__' not in cls_dict or not callable(cls_dict['__abs__']		21	if '__abs__' not in cls_dict or not callable(cls_dict['__abs__']
	>	):		>	):
	22	abs_implementation = lambda self: self		22	abs_implementation = lambda self: self
	23	if is_paramless_method(orig_abs):		23	if is_paramless_method(orig_abs):
	24	abs_implementation = lambda self: orig_abs(self)		24	abs_implementation = lambda self: orig_abs(self)
	25	elif is_paramless_method(orig_len):		25	elif is_paramless_method(orig_len):
	26	abs_implementation = lambda self: len(self)		26	abs_implementation = lambda self: len(self)
	27	elif is_paramless_method(orig_w) and is_paramless_method(ori		27	elif is_paramless_method(orig_w) and is_paramless_method(ori
	>	g_h):		>	g_h):
	28	abs_implementation = lambda self: getattr(self, attr_w)(		28	abs_implementation = lambda self: getattr(self, attr_w)(
	>	) * getattr(self, attr_h)()		>	) * getattr(self, attr_h)()
	29	elif attr_w in cls_dict and (not callable(orig_w)) and (attr		29	elif attr_w in cls_dict and (not callable(orig_w)) and (attr
	>	_h in cls_dict) and (not callable(orig_h)):		>	_h in cls_dict) and (not callable(orig_h)):
	30	abs_implementation = lambda self: getattr(self, attr_w)		30	abs_implementation = lambda self: getattr(self, attr_w)
	>	* getattr(self, attr_h)		>	* getattr(self, attr_h)
	31	cls_dict['__abs__'] = abs_implementation		31	cls_dict['__abs__'] = abs_implementation
	32			32
	33	class AbsProxy:		33	class AbsProxy:
	34			34
	35	def __get__(self, instance, owner):		35	def __get__(self, instance, owner):
	36	if instance is None:		36	if instance is None:
	37	return self		37	return self
	38	return instance.__abs__()		38	return instance.__abs__()
	39	cls_dict['abs'] = AbsProxy()		39	cls_dict['abs'] = AbsProxy()
	40	return super().__new__(mcls, cls_name, bases_tuple, cls_dict)		40	return super().__new__(mcls, cls_name, bases_tuple, cls_dict)

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