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Backward Compatible Schema Evolution in Python

A mock schema validator that evolves JSON schemas while preserving backward compatibility by keeping old fields and validating required ones.

schema-evolution json microservices

Python

import json
from copy import deepcopy


class SchemaValidator:
    def __init__(self, schema):
        self.schema = schema

    def evolve(self, new_schema):
        """Evolve mock schema while keeping backward compatibility."""
        for field in self.schema:
            if field not in new_schema:
               …

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