gramforge

library1.0.9pypypi✓ verified 86d ago

gramforge is a Python library for efficient multi-language generation from context-free or context-sensitive grammars (CFG/CSG). It supports generating strings and structures from grammar definitions, suitable for tasks like fuzzing, test generation, and language prototyping. Current version is 1.0.9, with a stable release cadence.

testing data ai-ml

pip install gramforge

package ↗

INSTALL

IMPORT

SIG · GRAMFORGE

gramforge

testingpythonv1.0.9

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

Constraint

✓ from gramforge import Constraint

✗ from gramforge import Grammar

Substitution

✓ from gramforge import Substitution

✗ from gramforge import Grammar

generate

✓ from gramforge import generate

✗ from gramforge import Grammar

Defines a grammar and generates a string from it.

from gramforge import Grammar, Generator # Define a simple grammar grammar = Grammar.from_string(''' S = 'Hello ' Name Name = 'world' | 'Alice' | 'Bob' ''') # Create a generator gen = Generator(grammar) # Generate a string result = gen.generate() print(result) # e.g., 'Hello world'

Debug

Known issues

gotchaGrammar syntax is custom and not compatible with common grammar formats (e.g., ANTLR, EBNF). Double-check the format for rules and terminals.

fix

Refer to the official documentation for grammar syntax (e.g., S = 'hello' Name).

affects: all

gotchaThe generator is not deterministic unless explicitly seeded. Repeated calls to generate() may yield different outputs.

fix

Use gen = Generator(grammar, seed=42) for reproducible output.

affects: all

gotchaGrammar.from_string() may raise ParseError for malformed rules. Always catch exceptions when processing dynamic grammars.

fix

Wrap in try-except: try: grammar = Grammar.from_string(rule) except Exception as e: print(e).

affects: all

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Version history

1.0.9latest on PyPI · released Apr 9, 2026

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Dependencies

No dependency data recorded yet.

Agent activity

27 hits · last 30 days

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OpenAI (training)

Resources

packagehttps://pypi.org/project/gramforge/ ↗