Meta

• License Expression: Apache-2.0 WITH LLVM-exception
  SPDX License Expression
• Author: The Wasmtime Project Developers
• Requires: Python >=3.9
• Provides-Extra: testing

Classifiers

• Programming Language
  • Python
  • Python :: 3
  • Python :: 3.9
  • Python :: 3.10
  • Python :: 3.11
  • Python :: 3.12
  • Python :: 3.13
  • Python :: 3.14
  • Python :: Implementation :: CPython
  • Python :: Implementation :: PyPy
  • Rust
• Topic
  • Software Development :: Compilers
  • Software Development :: Interpreters

Installation

To install wasmtime-py, run this command in your terminal:

$pipinstallwasmtime

The package currently supports 64-bit builds of Python 3.9+ on Windows, macOS, and Linux, for x86_64 and arm64 architectures.

Versioning

wasmtime-py follows the Wasmtime versioning scheme, with a new major version being released every month. As with Wasmtime itself, new major versions of wasmtime-py can contain changes that break code written against the previous major version.

Since every installed Python package needs to agree on a single version of wasmtime-py, to use the upper bound on the major version in the dependency requirement should be bumped reguarly, ideally as soon as a new wasmtime-py version is released. To automate this process it is possible to use the whitequark/track-pypi-dependency-version script. YoWASP/runtime is an example of a project that automatically publishes releases on PyPI once a new version of wasmtime-py is released if it passes the testsuite.

Usage

In this example, we compile and instantiate a WebAssembly module and use it from Python:

fromwasmtimeimport Store, Module, Instance, Func, FuncType

store = Store()
module = Module(store.engine, """
 (module
 (func $hello (import "" "hello"))
 (func (export "run") (call $hello))
 )
""")

defsay_hello():
 print("Hello from Python!")
hello = Func(store, FuncType([], []), say_hello)

instance = Instance(store, module, [hello])
run = instance.exports(store)["run"]
run(store)

Be sure to check out the examples directory, which has other usage patterns as well as the full API documentation of the wasmtime-py package.

Components

Components are also supported in wasmtime-py. For more information see the documentation of wasmtime.component. Using a component is similar to using core wasm modules, and for examples see the tests/component/ directory.

Contributing

See CONTRIBUTING.md.

Verified details

These details have been verified by PyPI

Maintainers

👁 Avatar for alexcrichton from gravatar.com
alexcrichton 👁 Avatar for tschneidereit from gravatar.com
tschneidereit

Unverified details

These details have not been verified by PyPI

Project links

• Bug Tracker
• Documentation
• Homepage
• Source Code

• Download URL: wasmtime-45.0.0.tar.gz
• Upload date: May 26, 2026
• Size: 128.3 kB
• Tags: Source
• Uploaded using Trusted Publishing? No
• Uploaded via: twine/6.1.0 CPython/3.13.12

Hashes for wasmtime-45.0.0.tar.gz

Algorithm	Hash digest
SHA256	2ad4bf7ca286ceea35c1e420d10b368d7f83faf9a5ffde87b4ee334a9b7f55f3
MD5	4233cf808026d36ff2a18b4d13abb0d5
BLAKE2b-256	b1ffdb9cfc61d988bc15303134bb174176a29839976876dfd18c3a12548ad291

See more details on using hashes here.

• Download URL: wasmtime-45.0.0-py3-none-win_arm64.whl
• Upload date: May 26, 2026
• Size: 6.8 MB
• Tags: Python 3, Windows ARM64
• Uploaded using Trusted Publishing? No
• Uploaded via: twine/6.1.0 CPython/3.13.12

Hashes for wasmtime-45.0.0-py3-none-win_arm64.whl

Algorithm	Hash digest
SHA256	ae9726590e6d90c6305b8b507c93468b145204d4390aa9a2e29e26babcae110e
MD5	a6634e242a29f390863f9426e09f6678
BLAKE2b-256	9cd1ac536e92ac95a02e137be5b6829f15b87d5eef93ace32e5ee8035155b839

See more details on using hashes here.

• Download URL: wasmtime-45.0.0-py3-none-win_amd64.whl
• Upload date: May 26, 2026
• Size: 8.0 MB
• Tags: Python 3, Windows x86-64
• Uploaded using Trusted Publishing? No
• Uploaded via: twine/6.1.0 CPython/3.13.12

Hashes for wasmtime-45.0.0-py3-none-win_amd64.whl

Algorithm	Hash digest
SHA256	1736a70a48f713aaf1a878514d29cc6f554213b5431e04447813a3b9b4320381
MD5	b8d9b3558532c6ca22760e539c9c3f76
BLAKE2b-256	20718e31ea472ceb934e7261ac59a786e82cd82b4d4dcb7c870d498aa9c3c21e

See more details on using hashes here.

• Download URL: wasmtime-45.0.0-py3-none-musllinux_1_2_x86_64.whl
• Upload date: May 26, 2026
• Size: 9.7 MB
• Tags: Python 3, musllinux: musl 1.2+ x86-64
• Uploaded using Trusted Publishing? No
• Uploaded via: twine/6.1.0 CPython/3.13.12

Hashes for wasmtime-45.0.0-py3-none-musllinux_1_2_x86_64.whl

Algorithm	Hash digest
SHA256	a0b6ca14b4628a5d1ffa91ccf2c0f2c58fa171f126ec085d564b09d5795395dd
MD5	a68a42eebca6ccc079bffca15ad62375
BLAKE2b-256	ea6349d8317706a108d9ed1d4166d0fc710796da1b20e591a98a96575dec367a

See more details on using hashes here.

• Download URL: wasmtime-45.0.0-py3-none-musllinux_1_2_aarch64.whl
• Upload date: May 26, 2026
• Size: 8.6 MB
• Tags: Python 3, musllinux: musl 1.2+ ARM64
• Uploaded using Trusted Publishing? No
• Uploaded via: twine/6.1.0 CPython/3.13.12

Hashes for wasmtime-45.0.0-py3-none-musllinux_1_2_aarch64.whl

Algorithm	Hash digest
SHA256	bef65282b7de744106a91da43e4d06ba19d2d587bc54abb83b3e757f0c4fc030
MD5	5cd266058b3aa02f336822d20b756996
BLAKE2b-256	62129b41740da83f51014b88181c9086de0ed75d736a5329baff7323c4fb6eff

See more details on using hashes here.

• Download URL: wasmtime-45.0.0-py3-none-manylinux2014_aarch64.whl
• Upload date: May 26, 2026
• Size: 8.6 MB
• Tags: Python 3
• Uploaded using Trusted Publishing? No
• Uploaded via: twine/6.1.0 CPython/3.13.12

Hashes for wasmtime-45.0.0-py3-none-manylinux2014_aarch64.whl

Algorithm	Hash digest
SHA256	a499f6ab0eebb70dca83d6a4904b743cd122f322af3abe86af08ad753533d946
MD5	50a2c4c95595a153d170ea7bf37e3d08
BLAKE2b-256	4256ed5f492bd553a31c8e28d621f8256f2c7b1a133b28f73525d96ca355891a

See more details on using hashes here.

• Download URL: wasmtime-45.0.0-py3-none-manylinux1_x86_64.whl
• Upload date: May 26, 2026
• Size: 9.7 MB
• Tags: Python 3
• Uploaded using Trusted Publishing? No
• Uploaded via: twine/6.1.0 CPython/3.13.12

Hashes for wasmtime-45.0.0-py3-none-manylinux1_x86_64.whl

Algorithm	Hash digest
SHA256	5d1416ec6da8cd87c29e2e9eb074358c91839c2fff971fe428c8921eaae68e73
MD5	6777a9159aa810c730cdd15018423c8d
BLAKE2b-256	d78ce9019a28e908214031310aefd78e4755221d02303190b54b2c85cb69573e

See more details on using hashes here.

• Download URL: wasmtime-45.0.0-py3-none-macosx_11_0_arm64.whl
• Upload date: May 26, 2026
• Size: 8.3 MB
• Tags: Python 3, macOS 11.0+ ARM64
• Uploaded using Trusted Publishing? No
• Uploaded via: twine/6.1.0 CPython/3.13.12

Hashes for wasmtime-45.0.0-py3-none-macosx_11_0_arm64.whl

Algorithm	Hash digest
SHA256	31d10f25c330cebcfb364e9a357123deeec96c41725ff2bba91b705587f38a93
MD5	9bb5bae157ccb5aa29e4815b3f70d59e
BLAKE2b-256	5b0ba81b5daf5adea482ecb68d9615f6a348486ab4d8e980a915d4420e57ee4d

See more details on using hashes here.

• Download URL: wasmtime-45.0.0-py3-none-macosx_10_13_x86_64.whl
• Upload date: May 26, 2026
• Size: 9.4 MB
• Tags: Python 3, macOS 10.13+ x86-64
• Uploaded using Trusted Publishing? No
• Uploaded via: twine/6.1.0 CPython/3.13.12

Hashes for wasmtime-45.0.0-py3-none-macosx_10_13_x86_64.whl

Algorithm	Hash digest
SHA256	3579b0ec6d001750d66ec7089aaeee2c048f88328c82743e15f099af01b0cf84
MD5	d037c6d3790a6581e594cced25bdb328
BLAKE2b-256	75767d0e440ca03a717a97889dbb7b68f952c20ed4ffd3f59addf9553579e1d5

See more details on using hashes here.

• Download URL: wasmtime-45.0.0-py3-none-any.whl
• Upload date: May 26, 2026
• Size: 8.0 MB
• Tags: Python 3
• Uploaded using Trusted Publishing? No
• Uploaded via: twine/6.1.0 CPython/3.13.12

Hashes for wasmtime-45.0.0-py3-none-any.whl

Algorithm	Hash digest
SHA256	6251ee5074a8b8bfaa98e6e99cb5d49d6d0f2320b3265d5aa6c2ee5df5fb4519
MD5	0b6e0fe446dd1e8b15cd6a6c8fdc859b
BLAKE2b-256	e1c77594da7fa8a3bc5e765733ad57aac9b7b27262c4afa47521bd500e4a4574

See more details on using hashes here.

• Download URL: wasmtime-45.0.0-py3-none-android_26_x86_64.whl
• Upload date: May 26, 2026
• Size: 9.6 MB
• Tags: Android API level 26+ x86-64, Python 3
• Uploaded using Trusted Publishing? No
• Uploaded via: twine/6.1.0 CPython/3.13.12

Hashes for wasmtime-45.0.0-py3-none-android_26_x86_64.whl

Algorithm	Hash digest
SHA256	35e713f907264e470f3bc9b592b81b8ed0f8f5651725d9f07a5d52beb0642e38
MD5	384ca3fcdf4b4d99c71abbf06c48a376
BLAKE2b-256	3f81c4d81ebf3db8aa28f789a9569640f30790d5234c509a0234cd502aa2638b

See more details on using hashes here.

• Download URL: wasmtime-45.0.0-py3-none-android_26_arm64_v8a.whl
• Upload date: May 26, 2026
• Size: 8.7 MB
• Tags: Android API level 26+ ARM64 v8a, Python 3
• Uploaded using Trusted Publishing? No
• Uploaded via: twine/6.1.0 CPython/3.13.12

Hashes for wasmtime-45.0.0-py3-none-android_26_arm64_v8a.whl

Algorithm	Hash digest
SHA256	4e843795b53e66c71313f2254731467372e5e1549227cf14accb9e2d57701c10
MD5	621ceb44c94dbf605656762316f73638
BLAKE2b-256	75567d941adba273210dcf4198266a47f472a5eeca20172005b443af71a9a3e7

See more details on using hashes here.