lemonmeringue 0.1.0

Enhanced Python SDK for LemonSlice API with retry logic and better error handling

🍋 LemonMeringue

Upcoming in a future LemonMeringue release: Support for inputting local files!

A fluffy layer of reliability and ease-of-use on top of the LemonSlice API

Enhanced Python SDK for the LemonSlice API with automatic retry logic, progress tracking, better error handling, and batch processing.

📚 Table of Contents

• Why LemonMeringue?
• Key Features
• Quick Start
  • Installation
  • Basic Usage
  • Quick Generate
• Testing Guide
• Advanced Usage
  • Batch Processing
  • Custom Retry Configuration
  • Input Validation
• Available Voices
• Configuration Options
  • Generation Parameters
  • Client Configuration
• Error Handling

🎯 Why LemonMeringue?

Before (Raw LemonSlice API):

# 20+ lines of boilerplate code
import requests
import time

response = requests.post("https://lemonslice.com/api/v2/generate",
    headers={"Authorization": "Bearer your_key"},
    json={"img_url": "...", "voice_id": "...", "text": "..."}
)

job_id = response.json()["job_id"]

# Manual polling loop
while True:
    status = requests.get(f"https://lemonslice.com/api/v2/generations/{job_id}")
    if status.json()["status"] == "completed":
        break
    time.sleep(5)  # Hope nothing goes wrong!

# Manual error handling, no retries, no progress tracking...

After (LemonMeringue):

# 3 lines of code - everything handled automatically
from lemonmeringue import quick_generate, Voices

result = await quick_generate(api_key, img_url, Voices.ANDREA, "Hello world!")
print(f"✅ Video ready: {result.video_url}")

✨ Key Features

🔄 Automatic Retry Logic

• Problem: LemonSlice API sometimes has temporary issues (500 errors, rate limits)
• Solution: Exponential backoff retries with configurable settings

📊 Progress Tracking

• Problem: Users don't know how long generation takes or current status
• Solution: Real-time progress callbacks with status updates

✅ Input Validation

• Problem: Invalid parameters cause confusing API errors
• Solution: Pre-validation with clear error messages before API calls

📦 Batch Processing

• Problem: Generating 10 videos = 10 separate API calls + manual management
• Solution: Concurrent batch processing with automatic queue management

🚀 Convenience Functions

• Problem: Setting up clients and making requests is verbose
• Solution: quick_generate() for simple use cases, context managers for complex ones

🎯 Type Hints & IDE Support

• Problem: Users don't know what parameters are available
• Solution: Full type hints for auto-completion and error detection

🚀 Quick Start

Installation

pip install lemonmeringue

Basic Usage

import asyncio
from lemonmeringue import LemonSliceClient, GenerationRequest, Voices

async def main():
    async with LemonSliceClient("your_api_key") as client:
        # Generate a video with progress tracking
        response = await client.generate_video(
            GenerationRequest(
                img_url="https://example.com/image.jpg",
                voice_id=Voices.ANDREA,
                text="Hello, this is a test!",
                expressiveness=0.8
            ),
            on_progress=lambda r: print(f"Status: {r.status.value}")
        )

        print(f"✅ Video generated: {response.video_url}")
        print(f"⏱️  Processing time: {response.processing_time:.1f}s")

asyncio.run(main())

Quick Generate (One-liner)

import asyncio
from lemonmeringue import quick_generate, Voices

async def main():
    result = await quick_generate(
        api_key="your_api_key",
        img_url="https://example.com/image.jpg",
        voice_id=Voices.ANDREA,
        text="Hello world!"
    )
    print(f"Video: {result.video_url}")

asyncio.run(main())

🧪 Testing Guide

Note: As of June 19, 2025, running the complete test suite costs approximately $0.60 in LemonSlice API credits.

1. Set Up Your Environment

# In your lemonmeringue repo directory
export LEMONSLICE_API_KEY="your_actual_api_key_here"

2. Run All Tests

python setup_and_test.py

3. Run Comprehensive Feature Tests

python test_all_features.py

4. Quick Test Only

python setup_and_test.py test-only

---

What Gets Tested

• ✅ Basic Functionality (video generation)
• ✅ Progress Tracking (real-time status)
• ✅ Input Validation (invalid parameters)
• ✅ Quick Generate (convenience function)
• ✅ Batch Processing (multiple videos)
• ✅ Retry Logic (error handling)
• ✅ Different Voices (voice options)
• ✅ Error Handling (exceptions)
• ✅ URL Validation (input checking)
• ✅ Parameter Testing (models/resolutions)

---

Example Output

🧪 Starting LemonMeringue comprehensive test suite...
🔑 Using API key: sk_1234...
🖼️  Test image: https://6ammc3n5zzf5ljnz...

🧪 Test 1/10: Basic Functionality
✅ Basic Functionality: Generated in 45.2s

🧪 Test 2/10: Progress Tracking
   📊 Progress update: processing
   📊 Progress update: completed
✅ Progress Tracking: 2 status updates received

...

📊 Test Summary: 10/10 passed
🎉 All tests passed! LemonMeringue is working perfectly!

---

Ready to Test?
Just set your API key and run python setup_and_test.py to verify all features with the real LemonSlice API. No file uploads needed—public image URLs are used.

🔧 Advanced Usage

Batch Processing

Generate multiple videos concurrently:

requests = [
    {"img_url": "img1.jpg", "voice_id": Voices.ANDREA, "text": "First video"},
    {"img_url": "img2.jpg", "voice_id": Voices.RUSSO, "text": "Second video"},
    {"img_url": "img3.jpg", "voice_id": Voices.EMMA, "text": "Third video"},
]

responses = await client.generate_batch(
    requests,
    on_progress=lambda i, total, response: print(f"Video {i}/{total}: {response.status.value}"),
    max_concurrent=3
)

for i, response in enumerate(responses):
    if isinstance(response, Exception):
        print(f"❌ Video {i+1} failed: {response}")
    else:
        print(f"✅ Video {i+1}: {response.video_url}")

Custom Retry Configuration

from lemonmeringue import RetryConfig

retry_config = RetryConfig(
    max_retries=5,
    backoff_factor=1.5,
    max_backoff=120.0
)

client = LemonSliceClient(
    api_key="your_api_key",
    retry_config=retry_config,
    enable_logging=True
)

Input Validation

# Validate URLs before generation
validation = await client.validate_inputs(
    img_url="https://example.com/image.jpg",
    audio_url="https://example.com/audio.mp3"
)

if validation['img_url_valid'] and validation.get('audio_url_valid', True):
    # Proceed with generation
    pass
else:
    print("❌ Invalid input URLs")

🎭 Available Voices

from lemonmeringue import Voices

# Popular voices
Voices.ANDREA    # Young woman, Spanish, calm, soft
Voices.RUSSO     # Middle-aged man, Australian, narrator
Voices.EMMA      # Young woman, German
Voices.GIOVANNI  # Young man, Italian, deep
Voices.RUSSELL   # Middle-aged man, British, dramatic

# Use in requests
request = GenerationRequest(
    img_url="image.jpg",
    voice_id=Voices.ANDREA,
    text="Your text here"
)

🛠️ Configuration Options

Generation Parameters

request = GenerationRequest(
    img_url="https://example.com/image.jpg",
    audio_url="https://example.com/audio.mp3",  # Optional
    voice_id=Voices.ANDREA,                     # For TTS
    text="Text to speak",                       # For TTS
    model="V2.5",                              # V2 or V2.5
    resolution="512",                          # 320, 512, or 640
    crop_head=False,                           # Focus on head region
    animation_style="autoselect",              # autoselect, face_only, entire_image
    expressiveness=1.0,                        # 0.0 to 1.0
)

Client Configuration

client = LemonSliceClient(
    api_key="your_api_key",
    timeout=60,                    # Request timeout in seconds
    enable_logging=True,           # Enable debug logging
    retry_config=RetryConfig(...)  # Custom retry behavior
)

🔍 Error Handling

from lemonmeringue import APIError, ValidationError

try:
    response = await client.generate_video(request)
except ValidationError as e:
    print(f"❌ Invalid input: {e}")
except APIError as e:
    print(f"❌ API error ({e.status_code}): {e}")
    if e.response:
        print(f"Response details: {e.response}")
except Exception as e:
    print(f"❌ Unexpected error: {e}")

📊 Response Information

response = await client.generate_video(request)

print(f"Job ID: {response.job_id}")
print(f"Status: {response.status.value}")
print(f"Video URL: {response.video_url}")
print(f"Processing time: {response.processing_time:.1f}s")
print(f"Created at: {response.created_at}")

🔗 API Compatibility

This SDK wraps the LemonSlice API v2. You'll need a LemonSlice API key to use this package.

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

🔗 Links

• PyPI: https://pypi.org/project/lemonmeringue/
• GitHub: https://github.com/neeldatta/lemonmeringue
• LemonSlice API: https://lemonslice.com/developer

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Made with 🍋 by Neel Datta