fairseq

library0.12.2pypypiunverified

fairseq is a sequence-to-sequence toolkit by Facebook AI Research, written in PyTorch. It provides reference implementations of various models for machine translation, language modeling, and other sequence generation tasks. Current version: 0.12.2. Release cadence is irregular, with the last significant release in 2021.

ai-ml llm-agents

pip install fairseq

github ↗package ↗

INSTALL

IMPORT

SIG · FAIRSEQ

fairseq

ai-mlpythonv0.12.2

Install

—

Import

—

Disk

—

Pass rate

0/ 10

Env Coverage0 / 10

glibc

3.9–3.13

musl

3.9–3.13

Install & Compatibility

Where this runs

tested against v? · pip install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

py 3.10–3.95 runs

build_error

glibc

py 3.10–3.95 runs

build_error

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

fairseq

✓ import fairseq

✗ import fairseq

Quickstart: load a pretrained translation model and translate a sentence.

import torch import fairseq # Load a pretrained model from torch.hub model = torch.hub.load('pytorch/fairseq', 'transformer.wmt14.en-fr', tokenizer='moses', bpe='subword_nmt') # Prepare input input_text = 'Hello world!' # Translate print(model.translate(input_text))

fairseq --version

Debug

Known issues

breakingBetween v0.9.0 and v0.10.0, the MultiheadAttention module changed from a single 'in_proj_weight' to separate k, v, q projections. Models saved with older versions will not load directly.

fix

Update model checkpoints or adjust code to match new parameter structure.

affects: 0.9.0 and earlier vs 0.10.0+

breakingIn v0.8.0, the torch.hub interface changed: 'generate' was renamed to 'translate'. Code using 'generate' will break.

fix

Replace .generate() with .translate() in your code.

affects: 0.7.x vs 0.8.0+

deprecatedMany components (e.g., older masked LM modules, dataset formats) have been deprecated or replaced. The project is in maintenance mode with few updates.

fix

Refer to the latest documentation and avoid using deprecated APIs.

affects: all

gotchafairseq is no longer actively maintained; new projects should consider alternatives like fairseq2 or direct PyTorch implementations.

fix

For new projects, consider using fairseq2 or other actively maintained toolkits.

affects: all

gotchaInstalling from source may require specific PyTorch versions (e.g., PyTorch 1.8 or older). Check the setup.py for exact dependencies.

fix

Use pip install fairseq to get prebuilt wheels or carefully match PyTorch version when building from source.

affects: all

Upgrade

Version history

0.12.2latest on PyPI · released Jun 27, 2022

Audit

Dependencies

torchrequiredRequired for tensor operations and neural network modules

numpyrequiredUsed for numerical operations

Agent activity

15 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/pytorch/fairseq ↗

packagehttps://pypi.org/project/fairseq/ ↗