[Python] How can I add unknown arguments in a POST request in FastAPI using BaseModel?

I have the following code:

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Request(BaseModel):
user_name: str
age: int
# other unknown arguments


@app.post("/home")
def write_home(request: Request):
print(request.__dict__)
return {
"user_name": request.user_name,
"age": request.age,
# other arguments...
}


I would like the request to take optional arguments (like height, weight, etc) but these arguments may be unknown.

Thanks in advance

I tried to add them directly in the request but it doesn't print out other unspecified arguments

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