Tornado Web Server

Join the chat at https://gitter.im/tornadoweb/tornado

Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed. By using non-blocking network I/O, Tornado can scale to tens of thousands of open connections, making it ideal for long polling, WebSockets, and other applications that require a long-lived connection to each user.

Hello, world

Here is a simple “Hello, world” example web app for Tornado:

import asyncio
import tornado

class MainHandler(tornado.web.RequestHandler):
    def get(self):
        self.write("Hello, world")

def make_app():
    return tornado.web.Application([
        (r"/", MainHandler),
    ])

async def main():
    app = make_app()
    app.listen(8888)
    await asyncio.Event().wait()

if __name__ == "__main__":
    asyncio.run(main())

This example does not use any of Tornado’s asynchronous features; for that see this simple chat room.

Documentation

Documentation and links to additional resources are available at https://www.tornadoweb.org

Release files for tornado 6.5.10

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for tornado 6.5.10
File	Size	Uploaded
tornado-6.5.10.tar.gz	537.9 kB	Sep 15, 2026	Details

Built distributions (wheels)

Table of built distributions (wheels) for tornado 6.5.10
File	Interpreter	ABI	Platform	Reset
tornado-6.5.10-cp39-abi3-win_arm64.whl 467.8 kB Sep 15, 2026	CPython 3.9	abi3	Windows ARM64	Details
tornado-6.5.10-cp39-abi3-win_amd64.whl 468.8 kB Sep 15, 2026	CPython 3.9	abi3	Windows x86-64	Details
tornado-6.5.10-cp39-abi3-win32.whl 468.4 kB Sep 15, 2026	CPython 3.9	abi3	Windows x86-32	Details
tornado-6.5.10-cp39-abi3-musllinux_1_2_x86_64.whl 467.3 kB Sep 15, 2026	CPython 3.9	abi3	Linux musl 1.2+ x86-64	Details
tornado-6.5.10-cp39-abi3-musllinux_1_2_aarch64.whl 467.9 kB Sep 15, 2026	CPython 3.9	abi3	Linux musl 1.2+ ARM64	Details
tornado-6.5.10-cp39-abi3-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl 468.1 kB Sep 15, 2026	CPython 3.9	abi3	Linux glibc 2.28+ ARM64, Linux glibc 2.17+ ARM64	Details
tornado-6.5.10-cp39-abi3-manylinux1_x86_64.manylinux_2_28_x86_64.manylinux_2_5_x86_64.whl 467.1 kB Sep 15, 2026	CPython 3.9	abi3	Linux glibc 2.5+ x86-64, Linux glibc 2.28+ x86-64	Details
tornado-6.5.10-cp39-abi3-macosx_10_9_x86_64.whl 464.0 kB Sep 15, 2026	CPython 3.9	abi3	macOS 10.9+ x86-64	Details
tornado-6.5.10-cp39-abi3-macosx_10_9_universal2.whl 465.9 kB Sep 15, 2026	CPython 3.9	abi3	macOS 10.9+ universal2 (ARM64, x86-64)	Details

Total release size: 4.7 MB

Release files / tornado-6.5.10.tar.gz

Download URL	tornado-6.5.10.tar.gz
Size	537.9 kB
Tags	Source
SHA-256 checksum How to use checksums	`a6b1ccd08c04b4a06fb5aeb381be99de5ad1e5375c1785e31d78c880feb57687`
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Upload date	Sep 15, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/7.0.0 CPython/3.13.14`

Provenance

Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/tornadoweb/tornado
Publishing commit: github.com/tornadoweb/tornado/tree/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7

Workflow

Publishing configuration: github.com/tornadoweb/tornado/blob/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7/.github/workflows/build.yml
Publishing logs: github.com/tornadoweb/tornado/actions/runs/34975871310/attempts/1

Artifact

Subject: tornado-6.5.10.tar.gz
SHA-256 checksum: a6b1ccd08c04b4a06fb5aeb381be99de5ad1e5375c1785e31d78c880feb57687 Verifying attestations

Release files / tornado-6.5.10-cp39-abi3-win_arm64.whl

Download URL	tornado-6.5.10-cp39-abi3-win_arm64.whl
Size	467.8 kB
Tags	CPython 3.9 Windows ARM64 abi3
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Upload date	Sep 15, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/7.0.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/tornadoweb/tornado
Publishing commit: github.com/tornadoweb/tornado/tree/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7

Workflow

Publishing configuration: github.com/tornadoweb/tornado/blob/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7/.github/workflows/build.yml
Publishing logs: github.com/tornadoweb/tornado/actions/runs/34975871310/attempts/1

Artifact

Subject: tornado-6.5.10-cp39-abi3-win_arm64.whl
SHA-256 checksum: ce045d3c298fddd30e89a2777f97039d1b641eb9518ac7b26a4721903539c694 Verifying attestations

Release files / tornado-6.5.10-cp39-abi3-win_amd64.whl

Download URL	tornado-6.5.10-cp39-abi3-win_amd64.whl
Size	468.8 kB
Tags	CPython 3.9 Windows x86-64 abi3
SHA-256 checksum How to use checksums	`37ae8f150cecfdbf747fc4e12f5e9a97ecd8cf1d4cdb3f119e2de84b11196918`
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Upload date	Sep 15, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/7.0.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/tornadoweb/tornado
Publishing commit: github.com/tornadoweb/tornado/tree/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7

Workflow

Publishing configuration: github.com/tornadoweb/tornado/blob/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7/.github/workflows/build.yml
Publishing logs: github.com/tornadoweb/tornado/actions/runs/34975871310/attempts/1

Artifact

Subject: tornado-6.5.10-cp39-abi3-win_amd64.whl
SHA-256 checksum: 37ae8f150cecfdbf747fc4e12f5e9a97ecd8cf1d4cdb3f119e2de84b11196918 Verifying attestations

Release files / tornado-6.5.10-cp39-abi3-win32.whl

Download URL	tornado-6.5.10-cp39-abi3-win32.whl
Size	468.4 kB
Tags	CPython 3.9 Windows x86-32 abi3
SHA-256 checksum How to use checksums	`302eb1e0e3e159314eb591920529fdea80acca92df5510a2cec5bbd4f099ec72`
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Upload date	Sep 15, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/7.0.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/tornadoweb/tornado
Publishing commit: github.com/tornadoweb/tornado/tree/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7

Workflow

Publishing configuration: github.com/tornadoweb/tornado/blob/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7/.github/workflows/build.yml
Publishing logs: github.com/tornadoweb/tornado/actions/runs/34975871310/attempts/1

Artifact

Subject: tornado-6.5.10-cp39-abi3-win32.whl
SHA-256 checksum: 302eb1e0e3e159314eb591920529fdea80acca92df5510a2cec5bbd4f099ec72 Verifying attestations

Release files / tornado-6.5.10-cp39-abi3-musllinux_1_2_x86_64.whl

Download URL	tornado-6.5.10-cp39-abi3-musllinux_1_2_x86_64.whl
Size	467.3 kB
Tags	CPython 3.9 Linux musl 1.2+ x86-64 abi3
SHA-256 checksum How to use checksums	`4bd192b959f9128fb99b8898148070ba4574c9589b78bce42d1851131fe85828`
BLAKE2b-256 checksum How to use checksums	`285eb4facf94370dba006819c8d304376f8b9fbec6b935b5e51bf45823a9790b`
Upload date	Sep 15, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/7.0.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/tornadoweb/tornado
Publishing commit: github.com/tornadoweb/tornado/tree/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7

Workflow

Publishing configuration: github.com/tornadoweb/tornado/blob/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7/.github/workflows/build.yml
Publishing logs: github.com/tornadoweb/tornado/actions/runs/34975871310/attempts/1

Artifact

Subject: tornado-6.5.10-cp39-abi3-musllinux_1_2_x86_64.whl
SHA-256 checksum: 4bd192b959f9128fb99b8898148070ba4574c9589b78bce42d1851131fe85828 Verifying attestations

Release files / tornado-6.5.10-cp39-abi3-musllinux_1_2_aarch64.whl

Download URL	tornado-6.5.10-cp39-abi3-musllinux_1_2_aarch64.whl
Size	467.9 kB
Tags	CPython 3.9 Linux musl 1.2+ ARM64 abi3
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Upload date	Sep 15, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/7.0.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/tornadoweb/tornado
Publishing commit: github.com/tornadoweb/tornado/tree/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7

Workflow

Publishing configuration: github.com/tornadoweb/tornado/blob/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7/.github/workflows/build.yml
Publishing logs: github.com/tornadoweb/tornado/actions/runs/34975871310/attempts/1

Artifact

Subject: tornado-6.5.10-cp39-abi3-musllinux_1_2_aarch64.whl
SHA-256 checksum: 66aaa3f57d30c6e6becee83ff28055d5930ac724214bde99393eefda83d5e015 Verifying attestations

Release files / tornado-6.5.10-cp39-abi3-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl

Download URL	tornado-6.5.10-cp39-abi3-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl
Size	468.1 kB
Tags	CPython 3.9 Linux glibc 2.17+ ARM64 Linux glibc 2.28+ ARM64 abi3
SHA-256 checksum How to use checksums	`69acca6501eed74582b76dbbceee2a91613f54728e3e418346000d7103101676`
BLAKE2b-256 checksum How to use checksums	`2917cc35dff68272d685cffd8600ffafbd8067e7d05e7348d9f80caddffbbd5f`
Upload date	Sep 15, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/7.0.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/tornadoweb/tornado
Publishing commit: github.com/tornadoweb/tornado/tree/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7

Workflow

Publishing configuration: github.com/tornadoweb/tornado/blob/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7/.github/workflows/build.yml
Publishing logs: github.com/tornadoweb/tornado/actions/runs/34975871310/attempts/1

Artifact

Subject: tornado-6.5.10-cp39-abi3-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl
SHA-256 checksum: 69acca6501eed74582b76dbbceee2a91613f54728e3e418346000d7103101676 Verifying attestations

Release files / tornado-6.5.10-cp39-abi3-manylinux1_x86_64.manylinux_2_28_x86_64.manylinux_2_5_x86_64.whl

Download URL	tornado-6.5.10-cp39-abi3-manylinux1_x86_64.manylinux_2_28_x86_64.manylinux_2_5_x86_64.whl
Size	467.1 kB
Tags	CPython 3.9 Linux glibc 2.28+ x86-64 Linux glibc 2.5+ x86-64 abi3
SHA-256 checksum How to use checksums	`bdf942448169e5336451d0494d7e3d81cfa726d5aa312affdc4682dd62a62f6d`
BLAKE2b-256 checksum How to use checksums	`6033df6d7d04854a58619f8349a51e3edb138324130a7562b0bb21f115bb940f`
Upload date	Sep 15, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/7.0.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/tornadoweb/tornado
Publishing commit: github.com/tornadoweb/tornado/tree/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7

Workflow

Publishing configuration: github.com/tornadoweb/tornado/blob/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7/.github/workflows/build.yml
Publishing logs: github.com/tornadoweb/tornado/actions/runs/34975871310/attempts/1

Artifact

Subject: tornado-6.5.10-cp39-abi3-manylinux1_x86_64.manylinux_2_28_x86_64.manylinux_2_5_x86_64.whl
SHA-256 checksum: bdf942448169e5336451d0494d7e3d81cfa726d5aa312affdc4682dd62a62f6d Verifying attestations

Release files / tornado-6.5.10-cp39-abi3-macosx_10_9_x86_64.whl

Download URL	tornado-6.5.10-cp39-abi3-macosx_10_9_x86_64.whl
Size	464.0 kB
Tags	CPython 3.9 abi3 macOS 10.9+ x86-64
SHA-256 checksum How to use checksums	`83e6cf438b106c6b3852d70960967bb1b70c87438050dca0981e4b9aa751a4c1`
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Upload date	Sep 15, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/7.0.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/tornadoweb/tornado
Publishing commit: github.com/tornadoweb/tornado/tree/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7

Workflow

Publishing configuration: github.com/tornadoweb/tornado/blob/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7/.github/workflows/build.yml
Publishing logs: github.com/tornadoweb/tornado/actions/runs/34975871310/attempts/1

Artifact

Subject: tornado-6.5.10-cp39-abi3-macosx_10_9_x86_64.whl
SHA-256 checksum: 83e6cf438b106c6b3852d70960967bb1b70c87438050dca0981e4b9aa751a4c1 Verifying attestations

Release files / tornado-6.5.10-cp39-abi3-macosx_10_9_universal2.whl

Download URL	tornado-6.5.10-cp39-abi3-macosx_10_9_universal2.whl
Size	465.9 kB
Tags	CPython 3.9 abi3 macOS 10.9+ universal2 (ARM64, x86-64)
SHA-256 checksum How to use checksums	`9261783640e23258694a9ff0795df430a5a7b0a651d3dd53dd0969ad6be16da7`
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Upload date	Sep 15, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/7.0.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/tornadoweb/tornado
Publishing commit: github.com/tornadoweb/tornado/tree/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7

Workflow

Publishing configuration: github.com/tornadoweb/tornado/blob/143a06bad00bc49ee00dbf61c0b63cc3d23a52a7/.github/workflows/build.yml
Publishing logs: github.com/tornadoweb/tornado/actions/runs/34975871310/attempts/1

Artifact

Subject: tornado-6.5.10-cp39-abi3-macosx_10_9_universal2.whl
SHA-256 checksum: 9261783640e23258694a9ff0795df430a5a7b0a651d3dd53dd0969ad6be16da7 Verifying attestations