PythonCloneDetection

Detect semantically similar python code using fine-tuned GraphCodeBERT model.

About

This modified GraphCodeBERT model was fine-tuned for 11 hours using an A40 server on the PoolC (1fold) dataset, which contains over 6M pairs of semantically similar python code snippets.

It is then used to predict the similarity of python code snippets in other folds of the PoolC dataset, as well as the C4 dataset. It achieved F1 scores of greater than 0.97 on all datasets in several experiments, where balanced sampling was applied.

Prerequisites & Installation

• pip

  In your virtual environment, run:

  pip install -r requirements.txt

  to install the required packages.

• conda

  To create a new conda environment called PythonCloneDetection with the required packages, run:

  conda env create -f environment.yml

  (this may take a while to finish)

The above commands will install cpu-only version of the pytorch package. Please refer to PyTorch's official website for instructions on how to install other versions of pytorch on your machine.

Usage

1. Run python main.py --input <input_file> --output_dir <output_directory> to run CloneClassifier on the specified input file and save the predictions as results.csv in the specified output directory. By default, the input file is examples/c4.csv and the output directory is results/.

2. Use the command python main.py --help to see other optional arguments including max_token_size, fp16, and per_device_eval_batch_size.

3. You could also import CloneClassifier class from clone_classifier.py and use it in your own code, for example:

   import argparse
   import pandas as pd
   from clone_classifier import CloneClassifier
   
   
   args = argparse.Namespace(
               max_token_size=512,
               fp16=False,
               input="",
               output_dir="results/",
               per_device_eval_batch_size=8,
           )
   classifier = CloneClassifier(args)
   # enable fp16 for faster inference if available:
   # classifier.enable_fp16()
   
   df = pd.read_csv("examples/c4.csv").head(10)
   res_df = classifier.predict(df[["code1", "code2"]])
   
   print(res_df["predictions"] == df["similar"])
   # res_df.to_csv("results/results.csv", index=False)

License

Distributed under the MIT License. See LICENSE for more information.

Acknowledgments

• GraphCodeBERT
• Original work of the model by @snoop2head
• Dataset source from dacon
• Dataset shared by PoolC