GitHub-Python — Licensed & Elaborated Variants

This repository ships two complementary Python-code corpora extracted from public GitHub:

• Licensed Subset – strictly permissive-licensed files suitable for commercial redistribution / model training (main corpus used in our experiments).
• Elaborated Collection – a broader crawl that additionally contains files under copyleft or unclear licenses (GPL/AGPL/LGPL, etc.). Useful for analysis or pre-training where license mixing is acceptable.

Both variants target code-completion / generation research.

Dataset at a glance

	Licensed Subset	Elaborated Collection
Files (.py)	53,017	186,066
Unique repositories	16,447	59,852
Repository owners	12,515	43,517
Compressed size	732 MB	2.4 GB *
Vocabulary (tokens)	443,431	443,431 †
License coverage	Permissive only	Mixed (perm. + copyleft)
Secrets redacted	✅	⚠️ not guaranteed
Time window	≥ 2015-01-01	≥ 2015-01-01

* estimated – elaborated corpus is distributed as raw file list, not a single text file.
† same tokenizer file is shared by both variants.

Numbers were obtained from the final redacted corpus and companion metadata.

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Dataset structure

huggingface_dataset/
 ├─ mega_licensed_corpus_redacted.txt      # Licensed Subset – concatenated code
 ├─ python_files.txt                       # Licensed Subset – raw file URLs
 ├─ python_files_elaborated.txt            # Elaborated Collection – raw file URLs
 ├─ python_files_elaborated_metadata.csv   # Elaborated Collection metadata
 └─ custom_tokens_vocab.txt             # `<token>\t<id>` vocabulary file

Important Note

For technical reasons, seperate splits have been stored as seperate Dataset instances. See https://huggingface.co/datasets/jblitzar/github-python-metadata, https://huggingface.co/datasets/jblitzar/github-python-meta-elaborated, and https://huggingface.co/datasets/jblitzar/github-python-corpus .

File separator

Individual files are concatenated with the sentinel line:

# <FILESEP>

Anything following the sentinel until the next sentinel (or EOF) is the source code of one file.

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Dataset variants

1. Licensed Subset (mega_licensed_corpus_redacted.txt)

• 53 K permissively-licensed files (MIT/BSD/Apache/ISC/Unlicense).
• All API keys & credentials removed.
• Ready for redistribution & commercial use (respect upstream NOTICE files).

2. Elaborated Collection (python_files_elaborated.txt)

• 186 K files from a much larger crawl.
• Contains GPL / LGPL / AGPL and other copyleft licenses.
• Shipped as URL list + metadata CSV; you must download the files yourself (datasets.load_dataset streaming, wget, etc.).
• No license filtering or secret-redaction performed – use with caution.

When first loading the dataset, decide which variant aligns with your use case (e.g. proprietary model training → Licensed Subset only).

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Collection methodology

1. Repository discovery

   • Queried GitHub REST API for projects with ≥ 10 stars
     (earlier iterations used 100+, later expanded for coverage).
   • Only repositories with primary language Python and last commit ≥ 2015.

2. File filtering

   • Retain files whose size ∈ [1 KB, 100 KB].
   • Exclude common build/packaging scripts (setup.py, __init__.py, etc.).

3. License compliance

   • Allowed: MIT, Apache-2.0, BSD-2/3-Clause, ISC, Unlicense.
   • GPL, LGPL, AGPL and proprietary licenses were excluded.

4. Deduplication

   • Unique file SHA hashes; duplicates skipped.

5. Formatting & cleaning

   • Formatted with autopep8 to normalise whitespace.
   • Custom script removed trailing whitespace & normalised newlines.

6. Secret redaction

   • truffleHog + custom regex pass removed >150 active credentials.
   • Redacted corpus stored as mega_licensed_corpus_redacted.txt.

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Custom tokenisation

The accompanying custom_tokens_vocab.txt implements a Python-aware sub-token scheme:

1. Strip doc-strings & comments.
2. Split on:
   • Camel-Case boundaries (Camel → Camel, Case)
   • Underscores, spaces
   • Indentation & newlines (preserved as <newline> token)
3. Rare tokens (frequency < 10) were dropped → 443 k vocabulary.

Example:

def helloWorld(value):
    return value + 1

tokenises to:

def hello world ( value ) <newline> <tab> return value + 1 <newline>

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Usage

from datasets import load_dataset

ds = load_dataset("jblitzar/github-python-corpus", split="train")

print(ds[0]["code"][:300])        # raw source code

If you prefer token level examples (small reasons: memory), map the tokenizer:

from tokenizers import Tokenizer
tok = Tokenizer.from_file("custom_tokens_vocab.txt")

def encode(ex):
    ex["input_ids"] = tok.encode(ex["code"]).ids
    return ex

ds = ds.map(encode, remove_columns=["code"])

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Ethical considerations & limitations

• Licenses respected – only permissive licenses included; retain NOTICE files when redistributing derivative works.
• Secrets removed – automated & manual audits performed, yet users must not assume zero secrets; re-audit before public deployments.
• Code quality – projects vary in style & correctness. Generated models may replicate bugs or vulnerable patterns.

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Citation

If you use this dataset, please cite:

@misc{github-python-2024,
  author       = {JBlitzar},
  title        = {GitHub-Python: A Permissively Licensed Corpus of Python Code},
  year         = {2024},
  howpublished = {\url{https://huggingface.co/datasets/jblitzar/github-python}},
  note         = {Version 1.0}
}

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License

Dataset card and aggregation scripts: GPLv3.
Each code snippet remains under its original repository license (MIT, Apache-2.0, BSD, ISC, etc.). Users must comply with upstream notices when redistributing code or derivatives.