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is.js is a JavaScript validation library and data type checker. It provides a suite of utilities to verify whether variables are primitives, arrays, functions, or specific object types. The project allows for the implementation of custom validation logic and the use of naming namespaces to override default rules and regular expressions. It covers a broad range of validation capabilities, including numeric arithmetic properties, date and time analysis for relative and absolute ranges, and string format verification for patterns such as emails, URLs, and IP addresses. The library also includes
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trycast parses JSON-like values whose shape is defined by TypedDicts and other standard Python type hints.
Decorator which checks at Runtime whether the function is called with the correct type of parameters. And raises TypeMisMatch if the used parameters in a function call where invalid.
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The main features of agronholm/typeguard are: Runtime Type Checkers.
Open-source alternatives to agronholm/typeguard include: arasatasaygin/is.js — is.js is a JavaScript validation library and data type checker. It provides a suite of utilities to verify whether… beartype/beartype — .. # ------------------( LICENSE )------------------ .. # Copyright (c) 2014-2025 Beartype authors. .. # See "LICENSE"… davidfstr/trycast — trycast parses JSON-like values whose shape is defined by TypedDicts and other standard Python type hints. felixthec/strongtyping — Decorator which checks at Runtime whether the function is called with the correct type of parameters. And raises… loyada/typedpy — `typedpy` is a library for type-safe, strict, Python structures. It supports Python 3.6+. samuelcolvin/pydantic — Pydantic is a data validation library and parsing framework for Python. It functions as a type-based schema validator…