---
pretty_name: Plaincode CNL 100k
language:
- code
- en
- es
- fr
- pt
- zh
- hi
tags:
- code
- python
- plaincode
- controlled-natural-language
- semantic-roundtrip
size_categories:
- 100K<n<1M
configs:
- config_name: default
  data_files:
  - split: train
    path: data/train-*.jsonl.gz
---

# Plaincode CNL 100k

This dataset is generated with Plaincode by streaming Python source files, projecting each accepted Python module/function into the current controlled-natural-language surfaces, and enforcing strict exact Python roundtrip proof for every emitted language. The public row schema is one language per row: one accepted Python source emits sibling rows for en/es/fr/pt/zh/hi linked by python_source_id.

## Included surfaces

- Python source
- English CNL (`en`)
- Spanish CNL (`es`)
- French CNL (`fr`)
- Portuguese CNL (`pt`)
- Mandarin CNL (`zh`)
- Hindi CNL (`hi`)

## Acceptance gate

A row is accepted only when every requested CNL surface reverses back to the exact original Python bytes through Plaincode proof:

- `sha_exact_ok == true`
- `char_exact_ok == true`
- `byte_exact_ok == true`
- `exact_ok == true`
- `reverse_ast_ok == true`
- `reverse_compile_ok == true`

The public CNL fields must not contain private CST/proof transport markers.

## Schema

Each row is ordered for readability and training use:

1. `source_code`: the original Python source, first in the JSON object
2. `cnl`: `{"language": "en/es/fr/pt/zh/hi", "text": "..."}`
3. `ids`: row/source/run IDs linking sibling rows from the same Python source
4. `cnl_siblings`: sibling language list/count and all-language strictness flag
5. `roundtrip`, `proof`, `strict_exact`: reverse/proof data
6. `source_stats`, `source_metadata`, `semantic_family`, `engine`, `row_sha256`: inspection metadata at the bottom

The data shard writer preserves JSON key order. It does not sort keys alphabetically.

## Generation stats

```json
{
  "accepted_python_sources": 5756,
  "accepted_rows": 5756,
  "completed": false,
  "completed_shards": [
    "train-00000.jsonl.gz",
    "train-00001.jsonl.gz"
  ],
  "duplicates": 0,
  "emitted_language_rows": 34536,
  "family_counts": {
    "async": 62,
    "classes": 2997,
    "comprehensions": 950,
    "context_managers": 678,
    "exceptions": 1488,
    "functions": 4439,
    "generators": 216,
    "imports": 5286,
    "lambda": 357,
    "loops": 2202,
    "simple_module": 124
  },
  "filter_reasons": {
    "auto_generated": 368,
    "skipped_path_pattern": 372,
    "syntax_error:\"\\ \" is an invalid escape sequence. Did you mean \"\\\\ \"? A raw string is also an option.": 2,
    "syntax_error:\"\\$\" is an invalid escape sequence. Did you mean \"\\\\$\"? A raw string is also an option.": 1,
    "syntax_error:\"\\%\" is an invalid escape sequence. Did you mean \"\\\\%\"? A raw string is also an option.": 2,
    "syntax_error:\"\\(\" is an invalid escape sequence. Did you mean \"\\\\(\"? A raw string is also an option.": 4,
    "syntax_error:\"\\*\" is an invalid escape sequence. Did you mean \"\\\\*\"? A raw string is also an option.": 1,
    "syntax_error:\"\\+\" is an invalid escape sequence. Did you mean \"\\\\+\"? A raw string is also an option.": 1,
    "syntax_error:\"\\-\" is an invalid escape sequence. Did you mean \"\\\\-\"? A raw string is also an option.": 3,
    "syntax_error:\"\\.\" is an invalid escape sequence. Did you mean \"\\\\.\"? A raw string is also an option.": 16,
    "syntax_error:\"\\/\" is an invalid escape sequence. Did you mean \"\\\\/\"? A raw string is also an option.": 4,
    "syntax_error:\"\\:\" is an invalid escape sequence. Did you mean \"\\\\:\"? A raw string is also an option.": 1,
    "syntax_error:\"\\<\" is an invalid escape sequence. Did you mean \"\\\\<\"? A raw string is also an option.": 2,
    "syntax_error:\"\\?\" is an invalid escape sequence. Did you mean \"\\\\?\"? A raw string is also an option.": 1,
    "syntax_error:\"\\A\" is an invalid escape sequence. Did you mean \"\\\\A\"? A raw string is also an option.": 3,
    "syntax_error:\"\\D\" is an invalid escape sequence. Did you mean \"\\\\D\"? A raw string is also an option.": 1,
    "syntax_error:\"\\M\" is an invalid escape sequence. Did you mean \"\\\\M\"? A raw string is also an option.": 1,
    "syntax_error:\"\\S\" is an invalid escape sequence. Did you mean \"\\\\S\"? A raw string is also an option.": 3,
    "syntax_error:\"\\W\" is an invalid escape sequence. Did you mean \"\\\\W\"? A raw string is also an option.": 4,
    "syntax_error:\"\\[\" is an invalid escape sequence. Did you mean \"\\\\[\"? A raw string is also an option.": 3,
    "syntax_error:\"\\]\" is an invalid escape sequence. Did you mean \"\\\\]\"? A raw string is also an option.": 1,
    "syntax_error:\"\\c\" is an invalid escape sequence. Did you mean \"\\\\c\"? A raw string is also an option.": 1,
    "syntax_error:\"\\d\" is an invalid escape sequence. Did you mean \"\\\\d\"? A raw string is also an option.": 29,
    "syntax_error:\"\\h\" is an invalid escape sequence. Did you mean \"\\\\h\"? A raw string is also an option.": 1,
    "syntax_error:\"\\i\" is an invalid escape sequence. Did you mean \"\\\\i\"? A raw string is also an option.": 1,
    "syntax_error:\"\\j\" is an invalid escape sequence. Did you mean \"\\\\j\"? A raw string is also an option.": 1,
    "syntax_error:\"\\l\" is an invalid escape sequence. Did you mean \"\\\\l\"? A raw string is also an option.": 2,
    "syntax_error:\"\\m\" is an invalid escape sequence. Did you mean \"\\\\m\"? A raw string is also an option.": 3,
    "syntax_error:\"\\o\" is an invalid escape sequence. Did you mean \"\\\\o\"? A raw string is also an option.": 2,
    "syntax_error:\"\\p\" is an invalid escape sequence. Did you mean \"\\\\p\"? A raw string is also an option.": 1,
    "syntax_error:\"\\s\" is an invalid escape sequence. Did you mean \"\\\\s\"? A raw string is also an option.": 16,
    "syntax_error:\"\\w\" is an invalid escape sequence. Did you mean \"\\\\w\"? A raw string is also an option.": 13,
    "syntax_error:\"\\y\" is an invalid escape sequence. Did you mean \"\\\\y\"? A raw string is also an option.": 1,
    "syntax_error:\"\\|\" is an invalid escape sequence. Did you mean \"\\\\|\"? A raw string is also an option.": 2,
    "syntax_error:\"is not\" with 'int' literal. Did you mean \"!=\"?": 3,
    "syntax_error:\"is not\" with 'str' literal. Did you mean \"!=\"?": 3,
    "syntax_error:\"is\" with 'int' literal. Did you mean \"==\"?": 7,
    "syntax_error:\"is\" with 'str' literal. Did you mean \"==\"?": 8,
    "syntax_error:'(' was never closed": 19,
    "syntax_error:'bool' object is not callable; perhaps you missed a comma?": 1,
    "syntax_error:'break' in a 'finally' block": 1,
    "syntax_error:'return' in a 'finally' block": 7,
    "syntax_error:'return' outside function": 1,
    "syntax_error:'u' and 'r' prefixes are incompatible": 5,
    "syntax_error:'yield from' inside async function": 1,
    "syntax_error:Expected one or more names after 'import'": 1,
    "syntax_error:Function parameters cannot be parenthesized": 4,
    "syntax_error:Lambda expression parameters cannot be parenthesized": 1,
    "syntax_error:Missing parentheses in call to 'exec'. Did you mean exec(...)?": 1,
    "syntax_error:Missing parentheses in call to 'print'. Did you mean print(...)?": 696,
    "syntax_error:expected ':'": 5,
    "syntax_error:expected an indented block after class definition on line 5": 1,
    "syntax_error:expected an indented block after function definition on line 13": 1,
    "syntax_error:expected an indented block after function definition on line 25": 1,
    "syntax_error:inconsistent use of tabs and spaces in indentation": 28,
    "syntax_error:invalid character '…' (U+2026)": 1,
    "syntax_error:invalid decimal literal": 12,
    "syntax_error:invalid hexadecimal literal": 3,
    "syntax_error:invalid non-printable character U+00A0": 1,
    "syntax_error:invalid syntax": 62,
    "syntax_error:invalid syntax. Perhaps you forgot a comma?": 5,
    "syntax_error:leading zeros in decimal integer literals are not permitted; use an 0o prefix for octal integers": 8,
    "syntax_error:unexpected indent": 7,
    "syntax_error:unindent does not match any outer indentation level": 1,
    "syntax_error:unmatched ')'": 4,
    "syntax_error:unmatched '}'": 1,
    "syntax_error:unterminated string literal (detected at line 116)": 1,
    "syntax_error:unterminated triple-quoted string literal (detected at line 19)": 1,
    "syntax_error:unterminated triple-quoted string literal (detected at line 430)": 1,
    "syntax_error:unterminated triple-quoted string literal (detected at line 81)": 1,
    "too_large": 534,
    "too_many_ast_nodes": 3,
    "too_many_lines": 34,
    "too_small": 162
  },
  "filtered_candidates": 2504,
  "finished_utc": "2026-05-30T15:40:07+00:00",
  "hf_repo_id": "CircularBalls/plaincode-cnl-100k-by-language",
  "languages": [
    "en",
    "es",
    "fr",
    "pt",
    "zh",
    "hi"
  ],
  "projection_failures": 3,
  "resume_accepted_rows": 0,
  "resume_skipped_accepted_rows": 0,
  "resume_start_shard": 0,
  "row_schema": "source-code-first-one-language-per-row-v2",
  "run_id": "run_20260530_153047_utc",
  "seen_candidates": 8264,
  "shards_completed": 2,
  "source_label_counts": {
    "github_code_clean_python_mit_single": 5756
  },
  "source_specs": [
    {
      "config": "Python-mit",
      "dataset": "codeparrot/github-code-clean",
      "enabled": true,
      "label": "github_code_clean_python_mit_single",
      "split": "train",
      "trust_remote_code": false,
      "weight": 1
    }
  ],
  "started_utc": "2026-05-30T15:30:49+00:00",
  "strict_gate_failures": 0,
  "target_accepted_rows": 100000,
  "updated_utc": "2026-05-30T15:40:07+00:00"
}
```

## Intended use

Training/evaluating semantic projection, code-to-CNL, CNL-to-code, multilingual controlled-language alignment, and exact roundtrip experiments.

## Source/license note

Rows retain source metadata where available, including license fields exposed by upstream datasets. The default generator configuration prioritizes permissive-ish Python source configs. Review upstream licenses before redistribution or commercial use.