Input Validation Python Packages

pydantic-ai-shields

Guardrail capabilities for Pydantic AI — cost tracking, prompt injection detection, PII filtering, secret redaction, tool permissions, and async guardrails. Built on pydantic-ai's native capabilities API.

little-canary

Detects prompt injection by its effect on a sacrificial canary model, not just pattern matching: untrusted input hits a powerless model first, a behavioral check reads the residue, and it returns block, flag, or pass before your primary model acts. Inbound preflight sensor, not a guarantee.

userprovided

A Python package to check input for validity and plausibility. Convert input into standardized formats.

phx-filters

Opinionated schema validation for Python - chain type-safe filters with | like UNIX pipes

pydantic-ai-middleware

Guardrail capabilities for Pydantic AI — cost tracking, prompt injection detection, PII filtering, secret redaction, tool permissions, and async guardrails. Built on pydantic-ai's native capabilities API.

cooked-input

Cooked Input library for getting and validating input from the command line.

llm-input-hardening

Deterministic Unicode-aware input hardening for LLM applications. Bounded inspection, structured reports, and configurable enforcement.

payload-validator

Python payload validator

gae-validators

User input validation with defaults for the Google App Engine datastore.

typed-input

Effortless type-safe user input for integers, floats, dates, and more...

nitro-validator

Validate data in one line. 51+ built-in rules, zero dependencies, clean pipe syntax.

ctkentrymsg

CTkEntry widget with provision to add short information, warning, and error messages below the widget.

rangeforce

Developer-friendly value range checks with user-friendly error messages

ai-workflow-automator

ai-workflow-automator turns plain text into validated AI pipeline configs for seamless serverless data workflows.

janus-validation

Janus is a Python library designed for robust data validation, serialization, and schema versioning. It offers a comprehensive toolkit to handle input validation, data transformation, and API schema evolution, making it ideal for modern Python applications that require data integrity and compatibility.

clap-api

Advanced Command Line Arguments Parser for Python 3

lightcli

A Python 3 library module for lightweight terminal interaction.

wr-schemas

I love schemas

inputvalidation

A python module to validate input.