Python

📸 PichaX SDK (Python)

The official Python SDK for interacting with the PichaX image transformation and identicon generation service. Generate signed, expirable image URLs for transformations such as rotate, resize, flip, and identicons — fast, secure, and simple.

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🚀 Installation

# pip install pichax
pip install git+https://github.com/Chakata-Technologies/pichax_python_sdk.git

Example

from pichax.client import PichaX

picha = PichaX(api_key="your_api_key", api_secret="your_api_secret")

# 🔁 Transform an image
transform_url = (
    picha.transform({
        "id": "img_123",
        "expires": "1725168000",  # Unix timestamp
        "src": "https://example.com/image.jpg",
        "cache": False,  # Not required. Default: True
        "params": {
            "rotate": {"degrees": 45},
            "resize": {"w": 100, "h": 200, "mode": "fill"},  # Modes: "fit", "fill", "crop"
            # Resize options:
            # {"scale": 0.5} -> scale image to 50% of the original size
            # {"w": 100} -> keep aspect ratio
            "effects": [{"grayscale": True}, {"blur": 10}, {"sharpen": True}],
            "format": "jpeg",   # Options: "webp", "jpeg", "png"
            "quality": 80,      # 0 - 100
            "watermark": {"text": "Hello there"},
            # custom watermarks are only supported in production key
            # a default watermark is applied otherwise
            "crop": {"x": 100, "y": 30, "w": 100, "h": 20}
            # Crop options:
            # {"w": 100, "h": 200, "mode": "centre"} -- Modes: "centre", "attention", "entropy"
        }
    })
    .get_url()
)

print(transform_url)

# 👤 Generate an identicon
identicon_url = (
    picha.identicon({
        "id": "user_123",
        "expires": "1725168000",
        "name": "PichaX"
    })
    .get_url()
)

print(identicon_url)

🔐 Signature Generation

All URLs include a signature for security, generated using HMAC-SHA256:

HMAC_SHA256(unique_key + ":" + expires, api_secret)

🧰 Transformations

Each transformation is optional and can be combined:

"params": {
            "rotate": {"degrees": 45},
            "resize": {"w": 100, "h": 200, "mode": "fill"},  # Modes: "fit", "fill", "crop"
            # Resize options:
            # {"scale": 0.5} -> scale image to 50% of the original size
            # {"w": 100} -> keep aspect ratio
            "effects": [{"grayscale": True}, {"blur": 10}, {"sharpen": True}],
            "format": "jpeg",   # Options: "webp", "jpeg", "png"
            "quality": 80,      # 0 - 100
            "watermark": {"text": "Hello there"},
            # custom watermarks are only supported in production key
            # a default watermark is applied otherwise
            "crop": {"x": 100, "y": 30, "w": 100, "h": 20}
            # Crop options:
            # {"w": 100, "h": 200, "mode": "centre"} -- Modes: "centre", "attention", "entropy
}

Crop

crop is a bit special. If { type: 'frontal_face' } is used, PichaX uses AI to detect a frontal looking face and crops by it. This feature is experimental and we are improving it every day.