"from" keyword in data to validate raises an Syntax error

Hello,

I’m running into a problem when validating the following data with pydantic:

{ "validity_dates": { "from": "2014-12-31", "to": "2015-12-31" } } It’s the “from” key in the data that is problematic:

class ValidityDates(pydantic.BaseModel): from: str to: str

This code raises a SyntaxError: invalid syntax. How can I map a supported class attribute like “from_” to the dict key “from” when:

1. validating the data
2. serialising the model

Thanks fo your help

[samuelcolvin]

from datetime import date
from pydantic import BaseModel


class Foobar(BaseModel):
    from_: date

    class Config:
        fields = {
            'from_': 'from'
        }


foobar = Foobar(**{'from': '2014-12-31'})
print(foobar)
print(repr(foobar.from_))

[samuelcolvin]

No problem, surely

def dict(self, *args, **kwargs):
    d = super().dict(*args, **kwargs)
    d['from'] = d.pop('from_')
    return d

Would be simpler.