kanpai 0.1.3

Python JSON schema validator with better error message

kanpai is a library for validating Python data structures, mainly those coverted from JSON. e.g. JSON received from api request, obtained from config file etc.

Example

Here is a quick example

import kanpai as Kanpai

schema = Kanpai.Object({
        'first_name': (Kanpai.String(error='User first name must be string.')
                       .trim()
                       .required(error='Please provide user first name.')
                       .max(256, error='Maximum allowed length is 256')),

        'last_name': (Kanpai.String(error='User last name must be a String')
                      .trim()
                      .required(error='Please provide user last name.')),

        'age'      : (Kanpai.Number(error='Age must be a number.')
                      .max(35,'Maximum allowed age is 35')
                      .min(18,'Age must be minimum 18'))

    })

validation_result = schema.validate({
  'first_name':'Chandrakanta',
  'age': 15
})

assert validation_result == {
  'success': False,
  'error': {
    'last_name': 'Please provide user last name.',
    'age': 'Age must be minimum 18'
  },
  'data': {
     'first_name':'Chandrakanta',
     'age': 15
  }
}

schema.validate return a dictionary obejct containing

{
 'success':'Whether validation is success or not',
 'error':'Validation error',
 'data':'Incase of error data provided for validation , in case success validated data'
}

Installation

Use pip

pip install kanpai

Test

pytest # to run tests
pytest --cov-report=html  --cov-branch --cov=kanpai # to generate coverage report