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API design & gRPC

REST best practices, protobuf, API versioning, and backward-compatible service contracts.

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API design & gRPC easy

How to Validate Data in Python for Beginners

A beginner-friendly Python class for validating required fields, types, ranges, and allowed choices in dict payloads.

validation data api
Python 
import json
from typing import Any, Dict, List, Optional, Union


class Validator:
    """A simple validate data helper designed for beginners."""

    def __init__(self, data: Union[Dict[str, Any], List[Any]]):
        self.data = data
        self.errors: Dict[str, str] = {}

    def validate_required(self, field: s…
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