🚀 LLML - Lightweight Language Markup Language

The most elegant way to generate structured text in Python.

LLML transforms your data into beautifully formatted XML-like markup with zero fuss and maximum flexibility. Perfect for context engineering, configuration generation, and structured document creation.

⚡ Quick Start

from zenbase_llml import llml

# Simple values
print(llml({"greeting": "Hello World"}))
# Output: <greeting>Hello World</greeting>

# Lists become numbered items
print(llml({"tasks": ["Buy milk", "Walk dog", "Code LLML"]}))
# Output:
# <tasks>
#   <tasks-1>Buy milk</tasks-1>
#   <tasks-2>Walk dog</tasks-2>
#   <tasks-3>Code LLML</tasks-3>
# </tasks>

# Complex nested structures
print(llml({
    "title": "My Project",
    "features": ["Fast", "Simple", "Powerful"],
    "config": {"debug": True, "version": "1.0"}
}))

🎯 Why LLML?

• 🔥 Zero Learning Curve: One function, infinite possibilities
• 🎨 Beautiful Output: Automatically formatted, properly indented
• 🔧 Flexible Architecture: Extensible formatter system for custom types
• ⚡ Lightning Fast: Minimal overhead, maximum performance
• 🌟 Pythonic: Feels natural, works everywhere
• 🔧 Customizable: Create your own formatters for specialized output

🛠️ Installation

pip install zenbase-llml

📚 Advanced Usage

Multi-line Content

instructions = """
Step 1: Install LLML
Step 2: Import llml
Step 3: Create magic
"""

print(llml({"instructions": instructions}))
# Output:
# <instructions>
# Step 1: Install LLML
# Step 2: Import llml
# Step 3: Create magic
# </instructions>

Complex Nested Structures

prompt_data = {
    "system": "You are a helpful assistant",
    "rules": [
        "Be concise and clear",
        "Provide examples when helpful",
        "Ask clarifying questions"
    ],
    "context": {
        "user_level": "beginner",
        "topic": "Python programming"
    }
}

print(llml(prompt_data))

Custom Formatters

LLML uses an extensible formatter system. You can create custom formatters for specialized types:

from zenbase_llml import llml
from zenbase_llml.formatters.vibe_xml import vibe_xml
from datetime import datetime

# Custom date formatter
def is_date(value):
    return isinstance(value, datetime)

def format_date(value, llml_func, formatters=None):
    return f"<date>{value.strftime('%Y-%m-%d')}</date>"

# Create custom formatter map
custom_formatters = {**vibe_xml, is_date: format_date}

# Use with custom formatters
result = llml({"created": datetime.now()}, formatters=custom_formatters)

For detailed information on creating and using formatters, see our Formatters Guide.

🎪 Use Cases

🤖 AI Prompt Engineering

Perfect for structuring complex prompts:

prompt = llml({
    "role": "Senior Python Developer",
    "task": "Code review the following function",
    "criteria": ["Performance", "Readability", "Best practices"],
    "code": function_to_review
})

⚙️ Configuration Generation

Generate clean config files:

config = llml({
    "database": {"host": "localhost", "port": 5432},
    "features": ["logging", "caching", "monitoring"],
    "environment": "production"
})

📄 Document Structure

Create structured documents:

document = llml({
    "title": "API Documentation",
    "sections": ["Authentication", "Endpoints", "Examples"],
    "metadata": {"version": "2.1", "author": "Dev Team"}
})

🧪 Testing

Run the comprehensive test suite:

# Run tests
uv run pytest

# Run with coverage
uv run pytest --cov=src --cov-report=html

# Test across Python versions
tox

🌐 Python Compatibility

LLML supports Python 3.8+ and is tested against:

• ✅ Python 3.8
• ✅ Python 3.9
• ✅ Python 3.10
• ✅ Python 3.11
• ✅ Python 3.12
• ✅ Python 3.13

🏗️ Development

# Clone the repo
git clone https://github.com/yourusername/llml.git
cd llml/py

# Create virtual environment and install dependencies
uv venv
source .venv/bin/activate
uv pip install -e .[dev]

# Run linting and formatting
uv run ruff check .
uv run ruff format .

# Run tests
uv run pytest

🤝 Contributing

We love contributions! Whether it's:

• 🐛 Bug reports
• 💡 Feature requests
• 📝 Documentation improvements
• 🔧 Code contributions

Check out our contribution guidelines to get started.

📄 License

MIT License - see LICENSE file for details.

🌟 Star History

If LLML makes your life easier, give us a star! ⭐

Made with ❤️ for the Python community

LLML: Because beautiful markup shouldn't be hard.