---
id: winrt-windows-storage-streams
version: "3.2.1"
license: MIT
license_treatment: permissive
maintenance: aging
---

# winrt-Windows.Storage.Streams — Python projection of Windows Runtime (WinRT) APIs

License: permissive · Maintenance: aging · Downloads: 329.4K/mo

## What it is and what it does

This package is a Python projection of the Windows Runtime Storage.Streams namespace, part of the modular PyWinRT ecosystem. It exposes WinRT stream classes and interfaces for reading and writing data to storage, allowing Python developers to work with Windows stream-based I/O directly. The package depends on winrt-runtime and is designed for Windows platforms only, with pre-built wheels for Python 3.9 through 3.14 across 32-bit, 64-bit, and ARM64 architectures.

It is typically used as a building block within larger WinRT applications—for instance, when working with file operations, network streams, or memory buffers through the Windows Runtime. The modular design means you install only the specific WinRT namespaces you need, rather than a monolithic package. The project is community-maintained as a fork of Microsoft's original xlang tool, with bindings generated and published separately per Windows SDK namespace.

Use it for:

- Building Windows desktop or UWP applications in Python that need to read or write data to streams via WinRT APIs.
- Integrating Python code with Windows system features that expose stream-based I/O through the Windows Runtime.
- Developing Python tools that interact with Windows storage or networking APIs requiring stream manipulation.

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

Provides Python bindings to Windows Runtime (WinRT) storage stream APIs, enabling direct access to stream-based I/O operations on Windows from Python code.

Yes, if you are developing on Windows and need WinRT stream I/O bindings. The MIT license and active modular architecture make it a straightforward choice for Windows-targeted Python projects. However, this is a Windows-only package with medium install friction (platform-specific wheels), so it is only relevant for Windows development. The aging maintenance status suggests slower updates, but no known vulnerabilities and recent commits indicate the project remains functional.

## Install

pip install winrt-windows-storage-streams
uv add winrt-windows-storage-streams
poetry add winrt-windows-storage-streams

## Installing winrt-Windows.Storage.Streams

Before you install: Medium install friction due to platform-specific wheels (Windows only, multiple architectures). The package is part of a modular ecosystem with a single runtime dependency (winrt-runtime). Maintenance status is aging—last commit was recent but the project shows slower activity patterns.

License in practice: MIT license permits commercial and private use with minimal restrictions, making it suitable for most projects.

Quickstart:

pip install winrt-Windows.Storage.Streams

from winrt.windows.storage.streams import DataWriter, DataReader
# Use stream classes for I/O operations

Windows operating system required; wheels available only for Windows (32-bit, 64-bit, ARM64) on Python 3.9–3.14.

Verify before relying:

- Whether this package is typically installed as a direct dependency or primarily as a transitive dependency of higher-level WinRT namespace packages.
- Specific stream I/O scenarios or patterns this binding is most commonly used for in practice.

## Package facts

- License: MIT (permissive)
- Python support: supports_current
- Install friction: medium
- Maintenance: aging
- Downloads: 329.4K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

winrt storage streams python, windows runtime stream bindings, python winrt file streams, windows storage io python, winrt stream operations, windows-only, winrt-bindings, stream-io

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