What is the purpose of using Field(...) as a default value in pydantic schemas

Romain Vincent :

I've read some parts of the Pydantic library and done some tests but I can't figure out what is the added benefit of using Field(...) (with no extra options) in a schema definition instead of simply not adding a default value.

So what is added here:

from pydantic import BaseModel, Field

class Model(BaseModel):
    a: int = Field(...)

that is not here:

from pydantic import BaseModel

class Model(BaseModel):
    a: int

Is there any special behaviour that I'm missing?

SColvin :

These are basically the same, the reason you might want to do this is so you can supply other settings to the field via kwargs to Field().

If you have no other settings for the field, using Field() is unnecessary.

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