started work on backend
This commit is contained in:
d3m1g0d
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from __future__ import nested_scopes, generators, division, absolute_import, with_statement, \
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print_function, unicode_literals
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from .utilities.compatibility import backport
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backport()
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import serial.abc
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from copy import deepcopy
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import serial
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from .utilities import qualified_name
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from .abc.model import Model
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try:
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import typing
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except ImportError as e:
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typing = None
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class Hooks(object):
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def __init__(
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self,
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before_marshal=None, # Optional[Callable]
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after_marshal=None, # Optional[Callable]
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before_unmarshal=None, # Optional[Callable]
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after_unmarshal=None, # Optional[Callable]
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before_serialize=None, # Optional[Callable]
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after_serialize=None, # Optional[Callable]
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before_deserialize=None, # Optional[Callable]
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after_deserialize=None, # Optional[Callable]
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before_validate=None, # Optional[Callable]
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after_validate=None, # Optional[Callable]
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):
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self.before_marshal = before_marshal
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self.after_marshal = after_marshal
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self.before_unmarshal = before_unmarshal
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self.after_unmarshal = after_unmarshal
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self.before_serialize = before_serialize
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self.after_serialize = after_serialize
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self.before_deserialize = before_deserialize
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self.after_deserialize = after_deserialize
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self.before_validate = before_validate
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self.after_validate = after_validate
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def __copy__(self):
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return self.__class__(**vars(self))
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def __deepcopy__(self, memo=None):
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# type: (dict) -> Memo
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return self.__class__(**{
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k: deepcopy(v, memo=memo)
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for k, v in vars(self).items()
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})
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def __bool__(self):
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return True
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class Object(Hooks):
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def __init__(
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self,
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before_marshal=None, # Optional[Callable]
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after_marshal=None, # Optional[Callable]
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before_unmarshal=None, # Optional[Callable]
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after_unmarshal=None, # Optional[Callable]
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before_serialize=None, # Optional[Callable]
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after_serialize=None, # Optional[Callable]
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before_deserialize=None, # Optional[Callable]
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after_deserialize=None, # Optional[Callable]
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before_validate=None, # Optional[Callable]
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after_validate=None, # Optional[Callable]
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before_setattr=None, # Optional[Callable]
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after_setattr=None, # Optional[Callable]
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before_setitem=None, # Optional[Callable]
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after_setitem=None, # Optional[Callable]
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):
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self.before_marshal = before_marshal
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self.after_marshal = after_marshal
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self.before_unmarshal = before_unmarshal
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self.after_unmarshal = after_unmarshal
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self.before_serialize = before_serialize
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self.after_serialize = after_serialize
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self.before_deserialize = before_deserialize
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self.after_deserialize = after_deserialize
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self.before_validate = before_validate
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self.after_validate = after_validate
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self.before_setattr = before_setattr
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self.after_setattr = after_setattr
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self.before_setitem = before_setitem
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self.after_setitem = after_setitem
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class Array(Hooks):
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def __init__(
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self,
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before_marshal=None, # Optional[Callable]
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after_marshal=None, # Optional[Callable]
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before_unmarshal=None, # Optional[Callable]
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after_unmarshal=None, # Optional[Callable]
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before_serialize=None, # Optional[Callable]
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after_serialize=None, # Optional[Callable]
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before_deserialize=None, # Optional[Callable]
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after_deserialize=None, # Optional[Callable]
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before_validate=None, # Optional[Callable]
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after_validate=None, # Optional[Callable]
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before_setitem=None, # Optional[Callable]
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after_setitem=None, # Optional[Callable]
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before_append=None, # Optional[Callable]
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after_append=None, # Optional[Callable]
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):
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self.before_marshal = before_marshal
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self.after_marshal = after_marshal
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self.before_unmarshal = before_unmarshal
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self.after_unmarshal = after_unmarshal
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self.before_serialize = before_serialize
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self.after_serialize = after_serialize
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self.before_deserialize = before_deserialize
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self.after_deserialize = after_deserialize
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self.before_validate = before_validate
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self.after_validate = after_validate
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self.before_setitem = before_setitem
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self.after_setitem = after_setitem
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self.before_append = before_append
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self.after_append = after_append
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class Dictionary(Hooks):
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def __init__(
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self,
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before_marshal=None, # Optional[Callable]
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after_marshal=None, # Optional[Callable]
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before_unmarshal=None, # Optional[Callable]
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after_unmarshal=None, # Optional[Callable]
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before_serialize=None, # Optional[Callable]
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after_serialize=None, # Optional[Callable]
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before_deserialize=None, # Optional[Callable]
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after_deserialize=None, # Optional[Callable]
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before_validate=None, # Optional[Callable]
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after_validate=None, # Optional[Callable]
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before_setitem=None, # Optional[Callable]
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after_setitem=None, # Optional[Callable]
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):
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self.before_marshal = before_marshal
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self.after_marshal = after_marshal
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self.before_unmarshal = before_unmarshal
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self.after_unmarshal = after_unmarshal
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self.before_serialize = before_serialize
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self.after_serialize = after_serialize
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self.before_deserialize = before_deserialize
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self.after_deserialize = after_deserialize
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self.before_validate = before_validate
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self.after_validate = after_validate
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self.before_setitem = before_setitem
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self.after_setitem = after_setitem
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def read(
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model_instance # type: Union[type, serial.abc.model.Model]
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):
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# type: (...) -> Hooks
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"""
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Read metadata from a model instance (the returned metadata may be inherited, and therefore should not be written to)
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"""
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if isinstance(model_instance, type):
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return model_instance._hooks
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elif isinstance(model_instance, Model):
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return model_instance._hooks or read(type(model_instance))
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def writable(
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model_instance # type: Union[type, serial.abc.model.Model]
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):
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# type: (...) -> Hooks
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"""
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Retrieve a metadata instance. If the instance currently inherits its metadata from a class or superclass,
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this funtion will copy that metadata and assign it directly to the model instance.
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"""
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if isinstance(model_instance, type):
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if model_instance._hooks is None:
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model_instance._hooks = (
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Object()
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if issubclass(model_instance, serial.model.Object) else
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Array()
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if issubclass(model_instance, serial.model.Array) else
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Dictionary()
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if issubclass(model_instance, serial.model.Dictionary)
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else None
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)
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else:
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for b in model_instance.__bases__:
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if hasattr(b, '_hooks') and (model_instance._hooks is b._hooks):
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model_instance._hooks = deepcopy(model_instance._hooks)
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break
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elif isinstance(model_instance, Model):
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if model_instance._hooks is None:
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model_instance._hooks = deepcopy(writable(type(model_instance)))
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return model_instance._hooks
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def write(
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model_instance, # type: Union[type, serial.abc.model.Model]
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meta # type: Hooks
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):
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# type: (...) -> None
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"""
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Write metadata to a class or instance
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"""
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if isinstance(model_instance, type):
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t = model_instance
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mt = (
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Object
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if issubclass(model_instance, serial.model.Object) else
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Array
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if issubclass(model_instance, serial.model.Array) else
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Dictionary
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if issubclass(model_instance, serial.model.Dictionary)
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else None
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)
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elif isinstance(model_instance, Model):
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t = type(model_instance)
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mt = (
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Object
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if isinstance(model_instance, serial.model.Object) else
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Array
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if isinstance(model_instance, serial.model.Array) else
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Dictionary
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if isinstance(model_instance, serial.model.Dictionary)
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else None
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)
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if not isinstance(meta, mt):
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raise ValueError(
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'Hooks assigned to `%s` must be of type `%s`' % (
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qualified_name(t),
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qualified_name(mt)
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)
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)
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model_instance._hooks = meta
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