Breaking News: Grepper is joining You.com. Read the official announcement!

dataclass init() got an unexpected keyword argument

Calm Coyote answered on October 22, 2022 Popularity 3/10 Helpfulness 1/10

answer dataclass __init__() got an unexpected keyword argument

dataclass init() got an unexpected keyword argument

Comment

from dataclasses import dataclass
import inspect

@dataclass
class Config:
    var_1: str
    var_2: str

    @classmethod
    def from_dict(cls, env):      
        return cls(**{
            k: v for k, v in env.items() 
            if k in inspect.signature(cls).parameters
        })


# usage:
params = {'var_1': 'a', 'var_2': 'b', 'var_3': 'c'}
c = Config.from_dict(params)   # works without raising a TypeError 
print(c)
# prints: Config(var_1='a', var_2='b')

Popularity 3/10 Helpfulness 1/10 Language whatever

Source: stackoverflow.com

Tags: data-class got keyword-argument whatever

Link to this answer
Share Copy Link