Testing jsonschema.

jsonschema_example.py

# pip install jsonschema

import json
from jsonschema import Draft4Validator

lista_exemplo = [
    {'attr1': 'A', 'attr2': 2, 'attr3': 3, 'attr4': 4},
    {'attr1': 1, 'attr2': 2, 'attr3': 3, 'attr4': 4, 'attr5': 5},
    {'attr1': 1, 'attr2': 2, 'attr3': 3, 'attr4': 4},
    {'attr1': 1, 'attr2': 2, 'attr3': 3, 'attr4': 4},
    {'attr1': 1, 'attr2': 2, 'attr3': 3, 'attr4': 4},
    {'attr1': 1, 'attr2': 2, 'attr3': 3, 'attr4': 4},
]

class InstanceValidator(object):

    schema = {
        "type" : "object",
        "properties" : {
            "attr1" : {"type" : "number"},
        },
        "required": ["attr5"]
    }

    def __init__(self, instance):
        self.instance = instance
    
    @classmethod
    def schema_is_valid(cls):
        return True if not Draft4Validator.check_schema(cls.schema) else False
    
    @property
    def is_valid(self):
        return Draft4Validator(self.schema).is_valid(self.instance)
    
    @property
    def errors(self):
        return sorted(Draft4Validator(self.schema).iter_errors(self.instance), key=lambda e: e.path)

print(InstanceValidator.schema_is_valid())
print('---')

for ex in lista_exemplo:
    iv = InstanceValidator(ex)
    if iv.is_valid:
        print(ex)
        print('---')
    else:
        print(ex)
        print(iv.errors)
        print('-x-')