CodeTrans model for code documentation generation php

Pretrained model on programming language php using the t5 base model architecture. It was first released in this repository. This model is trained on tokenized php code functions: it works best with tokenized php functions.

Model description

This CodeTrans model is based on the t5-base model. It has its own SentencePiece vocabulary model. It used multi-task training on 13 supervised tasks in the software development domain and 7 unsupervised datasets. It is then fine-tuned on the code documentation generation task for the php function/method.

Intended uses & limitations

The model could be used to generate the description for the php function or be fine-tuned on other php code tasks. It can be used on unparsed and untokenized php code. However, if the php code is tokenized, the performance should be better.

How to use

Here is how to use this model to generate php function documentation using Transformers SummarizationPipeline:

from transformers import AutoTokenizer, AutoModelWithLMHead, SummarizationPipeline

pipeline = SummarizationPipeline(
    model=AutoModelWithLMHead.from_pretrained("SEBIS/code_trans_t5_base_code_documentation_generation_php_multitask_finetune"),
    tokenizer=AutoTokenizer.from_pretrained("SEBIS/code_trans_t5_base_code_documentation_generation_php_multitask_finetune", skip_special_tokens=True),
    device=0
)

tokenized_code = "public static function update ( $ table ) { if ( ! is_array ( $ table ) ) { $ table = json_decode ( $ table , true ) ; } if ( ! SchemaManager :: tableExists ( $ table [ 'oldName' ] ) ) { throw SchemaException :: tableDoesNotExist ( $ table [ 'oldName' ] ) ; } $ updater = new self ( $ table ) ; $ updater -> updateTable ( ) ; }"
pipeline([tokenized_code])

Run this example in colab notebook.

Training data

The supervised training tasks datasets can be downloaded on Link

Training procedure

Multi-task Pretraining

The model was trained on a single TPU Pod V3-8 for half million steps in total, using sequence length 512 (batch size 4096). It has a total of approximately 220M parameters and was trained using the encoder-decoder architecture. The optimizer used is AdaFactor with inverse square root learning rate schedule for pre-training.

Fine-tuning

This model was then fine-tuned on a single TPU Pod V2-8 for 2000 steps in total, using sequence length 512 (batch size 256), using only the dataset only containing php code.

Test results :

Language / Model Python Java Go Php Ruby JavaScript
CodeTrans-ST-Small 17.31 16.65 16.89 23.05 9.19 13.7
CodeTrans-ST-Base 16.86 17.17 17.16 22.98 8.23 13.17
CodeTrans-TF-Small 19.93 19.48 18.88 25.35 13.15 17.23
CodeTrans-TF-Base 20.26 20.19 19.50 25.84 14.07 18.25
CodeTrans-TF-Large 20.35 20.06 19.54 26.18 14.94 18.98
CodeTrans-MT-Small 19.64 19.00 19.15 24.68 14.91 15.26
CodeTrans-MT-Base 20.39 21.22 19.43 26.23 15.26 16.11
CodeTrans-MT-Large 20.18 21.87 19.38 26.08 15.00 16.23
CodeTrans-MT-TF-Small 19.77 20.04 19.36 25.55 13.70 17.24
CodeTrans-MT-TF-Base 19.77 21.12 18.86 25.79 14.24 18.62
CodeTrans-MT-TF-Large 18.94 21.42 18.77 26.20 14.19 18.83
State of the art 19.06 17.65 18.07 25.16 12.16 14.90

Created by Ahmed Elnaggar | LinkedIn and Wei Ding | LinkedIn

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