Web3 integration · medium

31. Validating parsed JSON

Check required fields before trusting data.

Write `parse_block(raw)` that `json.loads`s a raw JSON string and raises `ValueError` if any of `"number"`, `"hash"`, `"transactions"` is missing, otherwise returns the parsed dict.

Required in your answer: json.loadsraise ValueError

Runs via Pyodide

import json

def parse_block(raw):
    # TODO
    pass

Output appears here.

← 30. Sorting with multiple keys 32. Hashing with hashlib →