python data class default value for str to None-CodePudding

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python data class default value for str to None

Time：11-01

I have a dataclass like this:

from dataclasses import dataclass

@dataclass
class DataClassCard:
    rank: str = None
    suit: str

I am getting an error saying:

TypeError: non-default argument 'suit' follows default argument

Is there anyway to set this default value?

Finally calling:

queen_of_hearts = DataClassCard(suit = 'a')
queen_of_hearts.rank

CodePudding user response：

Fields with a default value must come after any fields without a default. Just put suit above