CODEWITHSUNDEEP
pythonpython-3.7python-dataclasses
toing
toing

Reputation: 536

How to use Dataclass when using a dict as one of the fields?

Dataclass is changing dict across objects in the following code. What can i do to not have that behaviour?

from dataclasses import dataclass, field
from typing import Dict

@dataclass
class Test:
      param: Dict[str, int] = field(default_factory = lambda: ({"xyz": 0}))

test1_obj = Test()
test2_obj = Test()
test1_obj.param["xyz"] = 10
print(test1_obj.param["xyz"])
print(test2_obj.param["xyz"])

Both the lines printed return 10, while i wanted test2_obj to still return 0. How can i change in the construct of dataclass?

** this is fine behaviour on 3.7 version and higher **

Upvotes: 1

Views: 21718

Answers (1)

toing
toing

Reputation: 536

As suggested by many users here, this works fine on python 3.7 and higher versions.

Upvotes: 2

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