majiayu000 Nano Banana Pro - Image Generation & Editing
Generate or edit images using Gemini Image Generation API.
Modes
- Text-to-Image: Generate new images from text prompts
- Image Editing: Edit existing images with instructions
Usage
# Text-to-image
python scripts/nanobanana.py "{prompt}" --aspect-ratio "{ratio}"
# Image editing
python scripts/nanobanana.py "{prompt}" --input "{image_path}"
# Multiple reference images
python scripts/nanobanana.py "{prompt}" --input "{image1}" --input "{image2}"
Parameters
| Parameter | Required | Default | Description |
|---|---|---|---|
| prompt | Yes | - | Generation/edit instruction |
| --input, -i | No | - | Input image(s) for editing |
| --output, -o | No | auto | Output path |
| --aspect-ratio, -ar | No | 16:9 | Output ratio |
| --session, -s | No | - | Session name for organizing output |
| --force-ar | No | false | Force aspect ratio in edit mode |
Aspect Ratios
1:1, 4:3, 3:4, 16:9, 9:16, 21:9
Examples
# Generate landscape
python scripts/nanobanana.py "Mt. Fuji at sunset, photorealistic"
# Edit image
python scripts/nanobanana.py "Remove the background" --input photo.jpg
# Combine images
python scripts/nanobanana.py "Merge these into one composition" --input img1.png --input img2.png
# With session organization
python scripts/nanobanana.py "Company logo design" --session "brand_assets" --aspect-ratio 1:1
Requirements
- GEMINI_API_KEY or GOOGLE_API_KEY in environment
- Python packages: google-genai, Pillow, python-dotenv