gistfile2.py

import pandas
from pydantic import BaseModel

class Dataset(BaseModel):
    id: str
    name: constr(max_length=128)
    dataframe: pandas.DataFrame
    
    @validator('id')
    def is_uuid4_string(cls, value):
        try:
            UUID(value, version=4)
        except ValueError as ve:
            raise ValueError('The id value is not uuid4') from ve
        return value