mkurnikov <[email protected]> added the comment:
from pprint import pprint
from typing import List, Any, Dict
import dataclasses
from dataclasses import field
def service_interface_dict_factory(obj: Any) -> Dict[str, Any]:
print(type(obj)) # <- type(obj) here is a list, but there's no way to
understand whether it's a ServiceInterface or
# InputVar except for looking for the presence of certain keys which is not
very convenient
return dict(obj)
@dataclasses.dataclass
class InputVar(object):
name: str
required: bool = False
options: Dict[str, Any] = field(default_factory=dict)
@dataclasses.dataclass
class ServiceInterface(object):
input: List[InputVar] = field(default_factory=list)
if __name__ == '__main__':
inputvar_inst = InputVar(name='myinput',
required=False,
options={'default': 'mytext'})
interface = ServiceInterface(input=[inputvar_inst])
outdict = dataclasses.asdict(interface,
dict_factory=service_interface_dict_factory)
print('outdict', end=' ')
pprint(outdict)
# prints:
# outdict {'input': [{'name': 'myinput',
# 'options': {'default': 'mytext'},
# 'required': False}]}
# desirable output
# {'input': [{
# 'name': 'myinput',
# 'required': False,
# 'default': 'mytext'
# }]}
# "default" key moved to the root of the dictionary (inside list)
----------
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Python tracker <[email protected]>
<https://bugs.python.org/issue34409>
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