Voluptuous

About Voluptuous

Validates Python data structures with straightforward syntax and clear error messages. Ensures structure and content adhere to specified schemas.

Key Features

• 1Schema defined as Python data structures — dicts, lists, and primitives
• 2Composable validators using Python callables and built-in validators
• 3Strict mode raises errors on extra or unknown keys
• 4Coercion support to cast strings to ints, dates, and custom types
• 5Clear, hierarchical error messages pinpointing failing fields

How Python Data Engineers Use Voluptuous

Voluptuous is used in data pipelines to validate configuration files and incoming data payloads. Engineers define a `Schema` object and call it on each record — invalid data raises a `MultipleInvalid` exception with precise field-level detail, making it easy to log and skip malformed rows in batch processing jobs.