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83 lines
1.5 KiB
Markdown
83 lines
1.5 KiB
Markdown
---
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id: 6a0dcc730cb92a616f86f0bf
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title: "Challenge 295: Schema Validator Part 1"
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challengeType: 29
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dashedName: challenge-295
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---
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# --description--
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Given an object (JavaScript) or dictionary (Python), determine if it matches the following schema:
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```json
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{
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username: string
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}
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```
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- Extra keys are allowed
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# --hints--
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`is_valid_schema({"username": "bob"})` should return `True`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(is_valid_schema({"username": "bob"}), True)`)
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}})
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```
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`is_valid_schema({"username": "jen", "posts": 30})` should return `True`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(is_valid_schema({"username": "jen", "posts": 30}), True)`)
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}})
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```
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`is_valid_schema({"username": ""})` should return `True`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(is_valid_schema({"username": ""}), True)`)
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}})
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```
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`is_valid_schema({"username": 7})` should return `False`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(is_valid_schema({"username": 7}), False)`)
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}})
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```
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`is_valid_schema({"posts": 25})` should return `False`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(is_valid_schema({"posts": 25}), False)`)
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}})
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```
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# --seed--
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## --seed-contents--
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```py
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def is_valid_schema(obj):
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return obj
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```
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# --solutions--
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```py
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def is_valid_schema(obj):
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return isinstance(obj.get("username"), str)
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```
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