# Pytype

> static type checker for Python

**Wikidata**: [Q102522525](https://www.wikidata.org/wiki/Q102522525)  
**Source**: https://4ort.xyz/entity/pytype

## Summary
Pytype is a static type checker for the Python programming language developed by Google. It is classified as free software and is distributed under the Apache Software License 2.0. The source code is publicly hosted on GitHub.

## Key Facts
- **Developer:** Google (American multinational technology company).
- **Category:** Static type checker; Free software.
- **License:** Apache Software License 2.0.
- **Programming Language:** Written in Python.
- **Initial Release:** Version 0.2 was released on July 21, 2016.
- **Repository:** Hosted at `https://github.com/google/pytype`.
- **Website:** `https://google.github.io/pytype/`.
- **Package Registry:** Available as a project on PyPI (Python Package Index).

## FAQs
### Q: Who developed Pytype?
A: Pytype was developed by Google, the American multinational technology company also known for developing the Android operating system and Google Search.

### Q: What is the license for Pytype?
A: Pytype is distributed as free software under the Apache Software License 2.0.

### Q: When was Pytype released?
A: While specific inception dates are not provided, version 0.2 of Pytype was published on July 21, 2016.

## Why It Matters
Pytype serves as a critical utility in the Python software development ecosystem, addressing the challenge of type safety in a dynamically typed language. As a static type checker, it allows developers to analyze code for type errors before runtime, improving code reliability and maintainability. Its development by Google signifies its capability to handle large-scale codebases, distinguishing it as a robust tool for enterprise and open-source environments. By being open-source and freely available under the Apache 2.0 license, it contributes to the broader movement of adopting type hinting in Python (PEP 484), helping developers catch bugs early in the development cycle.

## Notable For
- **Corporate Backing:** Developed and maintained by Google, ensuring high engineering standards.
- **Open Source:** Fully accessible as free software under the permissive Apache 2.0 license.
- **Python Ecosystem Integration:** Native support and availability via PyPI and GitHub.
- **Static Analysis:** Provides the capability to check Python code types without executing the program.

## Body

### Development and Origin
Pytype was created by **Google**, a technology organization founded on September 4, 1998. The tool fits into the category of **free software**, allowing users to run, study, and distribute it freely. The project is actively maintained, with its source code repository located at `github.com/google/pytype`.

### Technical Specifications
The software is written in **Python** (a language inception-dated to 1991) and operates as a **static type checker**. It is designed to verify the types in Python codebases to prevent runtime errors.

### Licensing and Distribution
Pytype is distributed under the **Apache Software License 2.0**. It is listed on the **Python Package Index (PyPI)** under the project name `pytype`, facilitating easy installation for developers. The official documentation and project website are hosted at `google.github.io/pytype`.

### Release History
According to available records, a specific early version of the software, **version 0.2**, was released on **July 21, 2016**.

## References

1. [Source](https://github.com/google/pytype#license)
2. [Source](https://api.github.com/repos/google/pytype)
3. [Release 0.2. 2016](https://github.com/google/pytype/releases/tag/0.2)