freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-python/6a0dcc730cb92a616f86f0c0.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
6a0dcc730cb92a616f86f0c0	Challenge 296: Schema Validator Part 2	29	challenge-296

--description--

Given an object (JavaScript) or dictionary (Python), determine if it matches the following schema:

{
  username: string,
  posts: number,
  verified: boolean
}

• Extra keys are allowed

--hints--

is_valid_schema({"username": "alice", "posts": 10, "verified": False}) should return True.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_schema({"username": "alice", "posts": 10, "verified": False}), True)`)
}})

is_valid_schema({"username": "carol", "posts": 15, "verified": True, "followers": 25}) should return True.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_schema({"username": "carol", "posts": 15, "verified": True, "followers": 25}), True)`)
}})

is_valid_schema({"username": "frank", "posts": "21", "verified": True}) should return False.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_schema({"username": "frank", "posts": "21", "verified": True}), False)`)
}})

is_valid_schema({"username": "sam", "posts": 17, "verified": "false"}) should return False.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_schema({"username": "sam", "posts": 17, "verified": "false"}), False)`)
}})

is_valid_schema({"username": "bill", "verified": True}) should return False.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_schema({"username": "bill", "verified": True}), False)`)
}})

is_valid_schema({"username": "fred", "verified": True}) should return False.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_schema({"username": "fred", "verified": True}), False)`)
}})

is_valid_schema({"username": 5, "posts": 10, "verified": True}) should return False.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_schema({"username": 5, "posts": 10, "verified": True}), False)`)
}})

--seed--

--seed-contents--

def is_valid_schema(obj):

    return obj

--solutions--

def is_valid_schema(obj):
    return (
        isinstance(obj.get("username"), str) and
        isinstance(obj.get("posts"), int) and not isinstance(obj.get("posts"), bool) and
        isinstance(obj.get("verified"), bool)
    )