python - How do I use a keyword as a variable name?

Question

I have the following class with the variables from, to and rate. from is a keyword. If I want to use it in the init method below, what's the correct way to write it?

More context: The class needs the from variable explicitly as it's part of a json required by a POST endpoint written up by another developer in a different language. So changing the variable name is out of the question.

class ExchangeRates(JsonAware):
    def __init__(self, from, to, rate):
        self.from = from
        self.to = to
        self.rate = rate

JsonAware code:

class PropertyEquality(object):
    def __eq__(self, other):
        return (isinstance(other, self.__class__) and self.__dict__ == other.__dict__)

    def __ne__(self, other):
        return not self.__eq__(other)

    def __repr__(self):
        return '%s(%s)' % (self.__class__.__name__, ', '.join(['%s=%s' % (k, v) for (k, v) in self.__dict__.items()]))

class JsonAware(PropertyEquality):
    def json(self):
        return json.dumps(self, cls=GenericEncoder)

    @classmethod
    def from_json(cls, json):
        return cls(**json)

GenericEncoder code:

class GenericEncoder(json.JSONEncoder):
    def default(self, obj):
        return obj.__dict__

Answer 1

Add a single underscore to your preferred names: from_ and to_

(see PEP 8)

class ExchangeRates(JsonAware):
    def __init__(self, from_, to_, rate):
        self.from = from_
        self.to = to_
        self.rate = rate