def decode(self, data: dict, field_type: typing.Type) -> typing.Any:
origin_args = typing.get_args(field_type)
if data is None:
return None
return self.transcoder.decode(data, origin_args[0])
def encode(self, obj: typing.Any, field_type: typing.Type) -> typing.Any:
origin_args = typing.get_args(field_type)
if obj is None:
return None
return self.transcoder.encode(obj, origin_args[0])
def decode(self, data: dict, field_type: typing.Type) -> typing.Any:
origin_args = typing.get_args(field_type)
return {
self.trancoder.decode(k, origin_args[0]):
self.trancoder.decode(v, origin_args[1])
for k, v in data.items()
}
def encode(self, obj: typing.Any, field_type: typing.Type) -> typing.Any:
origin_args = typing.get_args(field_type)
return {
self.trancoder.encode(k, origin_args[0]):
self.trancoder.encode(v, origin_args[1])
for k, v in obj.items()
}
def can_handle(self, field_type: typing.Type) -> bool:
origin = typing.get_origin(field_type)
origin_args = typing.get_args(field_type)
return ( # typing.Optional[some_type]
origin is typing.Union and len(origin_args) == 2
and origin_args[1] is type(None) # noqa: E721
)
def decode(self, data: dict, field_type: typing.Type) -> typing.Any:
origin = typing.get_origin(field_type) or field_type
origin_args = typing.get_args(field_type)
return origin(self.trancoder.decode(o, origin_args[0]) for o in data)
def encode(self, obj: typing.Any, field_type: typing.Type) -> typing.Any:
origin_args = typing.get_args(field_type)
return [self.trancoder.encode(o, origin_args[0]) for o in obj]
def can_handle(self, field_type: typing.Type) -> bool:
origin = typing.get_origin(field_type) or field_type
origin_args = typing.get_args(field_type)
return (origin in (list, tuple) and len(origin_args) == 2
and origin_args[1] == Ellipsis)