[Python] How to update pydantic model from dictionary?

I have a pydantic model:

from pydantic import BaseModel

class MyModel(BaseModel):
value : str = 'Some value'


And I need to update this model using a dictionary (not create).

I tried updating the model using class.__dict__, but after updating that's just a dictionary, not model values.

So I need something like this:

from pydantic import BaseModel

class MyModel(BaseModel):
value : str = 'Some value'

model = MyModel()
update_model(model = model, data = {'value' : 'Bla bla bla'}) # here must be a function to update model

print(model.__dict__)
{'value' : 'Bla bla bla'}

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