rick 0.8.0

Python plumbing for micro-framework based applications

Rick

Python plumbing library for building microframework-based applications.

Rick provides essential building blocks and utilities for constructing robust, maintainable Python applications without imposing architectural constraints. It's lightweight, modular, and battle-tested.

Features

Core Components

• Dependency Injection - Service container with singleton and factory patterns, LRU caching
• Service Registry - Thread-safe dynamic class registration and retrieval
• Container Classes - Immutable and mutable data containers for type-safe configuration

Validation & Forms

• 30+ Validators - Email, IP, UUID, hash, string, numeric, and more
• Form Processing - Request validation with nested records and fieldsets
• Custom Validation - Easy-to-define custom validation functions
• Input Filters - Transform and sanitize input data

Serialization

• JSON Serializer - Extended JSON encoding with support for datetime, Decimal, UUID, dataclasses
• MessagePack Serializer - Binary serialization 30-50% smaller and 2-4x faster than JSON
• Type Preservation - Full bidirectional encoding/decoding with custom object support

Configuration Management

• EnvironmentConfig - Load configuration from environment variables with automatic type conversion
• File-Based Config - Support for JSON, TOML, and hybrid configurations
• Validation - Built-in validation functions for configuration correctness
• StrOrFile - Load sensitive values from files for enhanced security

Resource Management

• Redis Cache - Full-featured Redis caching with pickle, JSON, or MessagePack serialization
• Encrypted Cache - CryptRedisCache with Fernet256 encryption for sensitive data
• Stream Processing - MultiPartReader for multipart/form-data with seek support
• Console Output - ANSI colored terminal output with 16 colors and text attributes

Security & Cryptography

• Fernet256 - 256-bit encryption for data protection
• BCrypt - Secure password hashing
• Encrypted Caching - Built-in support for encrypting cached sensitive data
• Hash Utilities - SHA1, SHA256, SHA512 implementations

Additional Features

• Event System - Event manager for dispatching and handling events
• Mixins - Injectable, Runnable, and Translator mixins
• Console Utilities - AnsiColor and ConsoleWriter for beautiful CLI applications

Installation

pip install rick

For TOML configuration support (Python < 3.11):

pip install rick tomli

Quick Start

Dependency Injection

from rick.base import Di

# Create DI container
di = Di()

# Register singleton
config_instance = {'api_url': 'https://api.example.com'}
di.add('config', config_instance)

# Register factory with lazy loading
def create_logger(di_instance):
    return {'name': 'app_logger'}

di.add('logger', create_logger)

# Retrieve services
config = di.get('config')
logger = di.get('logger')  # Calls create_logger(di)

Form Validation

from rick.form import RequestRecord


class RegistrationForm(RequestRecord):
    def __init__(self):
        super().__init__()
        self.field('username', validators='required|alphanum|minlen:3')
        self.field('email', validators='required|email')
        self.field('password', validators='required|minlen:8')
        self.field('age', validators='required|int|between:18,120')


# Example usage
request_data = {
    'username': 'johndoe',
    'email': '[e-mail]',
    'password': 'securepass123',
    'age': 25
}

form = RegistrationForm()
if form.is_valid(request_data):
    user_data = form.get_data()
else:
    errors = form.get_errors()

Configuration Management

from rick.resource.config import EnvironmentConfig, StrOrFile


class AppConfig(EnvironmentConfig):
    DB_HOST = 'localhost'
    DB_PORT = 5432
    DB_PASSWORD = StrOrFile(None)  # Load from file
    DEBUG = False
    MAX_WORKERS = 4

    def validate_database(self, data: dict):
        if not data.get('db_host'):
            raise ValueError("Database host is required")


# Environment variables override defaults
config = AppConfig().build()
print(f"Database: {config['db_host']}:{config['db_port']}")
print(f"Debug mode: {config['debug']}")

Redis Caching

from rick.resource.redis import RedisCache, CryptRedisCache
from rick.serializer.msgpack import msgpack

# Example data
user_data = {'username': 'john_doe', 'email': '[e-mail]'}

# Standard cache with MessagePack
cache = RedisCache(
    host='localhost',
    serializer=msgpack.packb,
    deserializer=msgpack.unpackb,
    prefix='myapp:'
)

cache.set('user:123', user_data, ttl=3600)
user = cache.get('user:123')

# Encrypted cache for sensitive data
secure_cache = CryptRedisCache(
    key='0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef',
    host='localhost'
)

secure_cache.set('api_token', {'token': 'secret123'})
token = secure_cache.get('api_token')

Serialization

from rick.serializer.json.json import ExtendedJsonEncoder, CamelCaseJsonEncoder
from rick.serializer.msgpack import msgpack
import json
from datetime import datetime
from decimal import Decimal

# JSON serialization
data = {
    'timestamp': datetime.now(),
    'amount': Decimal('123.45'),
    'status': 'active'
}

# Standard JSON
json_str = json.dumps(data, cls=ExtendedJsonEncoder)

# CamelCase for JavaScript compatibility
json_str = json.dumps(data, cls=CamelCaseJsonEncoder)

# MessagePack - faster and smaller
packed = msgpack.packb(data)
restored = msgpack.unpackb(packed)  # Full type preservation

Console Output

from rick.resource.console import ConsoleWriter, AnsiColor

# High-level semantic output
console = ConsoleWriter()
console.header('Application Startup')
console.success('Database connected')
console.warn('Cache disabled')
console.error('Plugin failed to load')

# Low-level color formatting
color = AnsiColor()
print(color.red('Error:', attr='bold') + ' Operation failed')
print(color.green('Success', 'white', ['bold', 'underline']))

Documentation

Full documentation is available at https://docs.rick.oddbit.org

Key Documentation Sections

• Forms & Validation - Request validation and form processing
• Validators - Available validation rules
• Serializers - JSON and MessagePack serialization
• Configuration - Configuration management
• Redis Cache - Caching with Redis
• Console Output - Colored console output

Use Cases

Rick is ideal for:

• Custom Frameworks - Build domain-specific frameworks with Rick's components
• Microservices - Lightweight utilities for microservice architecture
• CLI Applications - Console output, configuration, and validation
• Background Workers - Job processing with caching and configuration
• API Servers - Request validation, caching, and serialization
• Data Processing - Validation, transformation, and serialization pipelines

Architecture

Rick follows a modular architecture where each component is independent:

rick/
├── base/          # DI, Registry, Containers
├── form/          # Forms and RequestRecord
├── validator/     # 30+ validation rules
├── filter/        # Input filters
├── serializer/    # JSON and MessagePack
├── resource/      # External resources
│   ├── config/    # Configuration loaders
│   ├── redis/     # Redis caching
│   ├── console/   # Console output
│   └── stream/    # Stream processing
├── crypto/        # Encryption utilities
├── event/         # Event system
├── mixin/         # Reusable mixins
└── util/          # General utilities

Python Version Support

• Python 3.10
• Python 3.11
• Python 3.12
• Python 3.13
• Python 3.14

Development

Requirements

• Python 3.10+
• Redis (for cache features)
• Docker (for running tests with testcontainers)

Setting Up Development Environment

# Clone the repository
git clone https://github.com/oddbit-project/rick.git
cd rick

# Create virtual environment
python -m venv .venv
source .venv/bin/activate  # On Windows: .venv\Scripts\activate

# Install with development dependencies
pip install -e .
pip install -r requirements-dev.txt

# Run tests
pytest

# Run tests with coverage
pytest --cov=rick --cov-report=html

# Run linting
flake8 rick/ tests/

Running Tests with Tox

Test across multiple Python versions:

# Run all tests
tox

# Run specific Python version
tox -e py310
tox -e py311
tox -e py312
tox -e py313
tox -e py314

# Run linting only
tox -e flake

Related Projects

• RickDb - Database abstraction layer for Rick
• Flask - Recommended web framework for HTTP functionality

Contributing

Contributions are welcome! Rick is maintained by the OddBit organization.

Guidelines

1. Fork the repository
2. Create a feature branch
3. Write tests for new functionality
4. Ensure all tests pass
5. Submit a pull request

Security

For security concerns, please review our security policy or contact the maintainers directly.

Security Features

• Encrypted caching with Fernet256
• BCrypt password hashing
• Secure configuration loading from files
• Input validation and sanitization
• Regular security audits with pip-audit

License

Rick is licensed under the BSD 3-Clause License. See the LICENSE file for details.

Changelog

See CHANGELOG.md for version history and release notes.

Support

• Issues: GitHub Issues
• Repository: GitHub
• PyPI: https://pypi.org/project/rick/