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@alanakbik alanakbik released this 03 Aug 16:25
· 6476 commits to master since this release
v0.2.0
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Breaking Changes

Reorganized package structure #12

There are now two packages: flair.models and flair.trainers for the models and model trainers respectively.

Models package

flair.models contains 3 model classes: SequenceTagger, TextClassifier and LanguageModel.

Trainers package

flair.trainers contains 3 model trainer classes: SequenceTaggerTrainer, TextClassifierTrainer and LanguageModelTrainer.

Direct import from package

You call these classes directly from the packages, for instance the SequenceTagger is now instantiated as:

from flair.models import SequenceTagger
tagger = SequenceTagger.load('ner')

Reorganized embeddings #12

Clear distinction between token-level and document-level embeddings by adding two classes, namely TokenEmbeddings and DocumentEmbeddings from which respective embeddings need to inherit.

New Features

LanguageModelTrainer #24 #17

Added LanguageModelTrainer class to train your own LM embeddings.

Document Classification #10

Added experimental TextClassifier model for document-level text classification. Also added corresponding model trainer class, i.e. TextClassifierTrainer.

Batch prediction #7

Added batching into prediction method for faster sequence tagging

CPU-friendly pre-trained models #29

Added pre-trained models with smaller LM embeddings for faster CPU-inference speed

You can load them by adding '-fast' to the model name. Only for English at present.

from flair.models import SequenceTagger
tagger = SequenceTagger.load('ner-fast')

Learning Rate Scheduling #19

Added learning rate schedulers to all trainer classes for improved learning rate annealing functionality and control.

Auto-spawn on GPUs #19

All model classes now automatically spawn on GPUs if available. The separate .cuda() call is no longer necessary.

Bug Fixes

Retagging error #23

Fixed error that occurred when using multiple pre-trained taggers on the same sentence.

Empty sentence error #33

Fixed error that caused data fetchers to sometimes create empty sentences.

Other

Unit Tests #15

Added a large set of automated unit tests for better stability.

Documentation #15

Expanded documentation and tutorials. Also expanded descriptions of APIs.

Code Simplifications in sequence tagger #19

A number of code simplifications all around, hopefully making the code easier to understand.

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