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what is the period in this video ill be teaching you how you can validate a field in a pidentic model so first of all we will import pedentic so from identic import page model so ill be creating a user model and this is a directing from base model so the user model have couple of fails that suppose it has name which is of type string and h which is of type imp and lets suppose it also has an email which is again a type of shrink okay so now we have to validate that the age must be a positive integer and as and also for email email must contain the ad symbol in it so this is how you can validate an email and an age so in order to validate we have to use accurate ring pedentic which is validator okay so now you have to specify which field you want to edit so you have to specify field lets suppose i have to validate age and you have to define a function so that it will perform the function and do the validation that you have to do so like i have to validate positive like that and it t