pictograph 0.1.6

Official Python SDK for Pictograph Context Engine - Computer Vision Annotation Platform

Pictograph Python SDK

Official Python SDK for Pictograph Context Engine - a powerful computer vision annotation platform for creating high-quality training datasets.

Features

• Simple, intuitive API - Get started with just a few lines of code
• Dataset management - List, download, and manage annotation datasets
• Image operations - Upload images, retrieve metadata, and manage assets
• Annotation tools - Get, save, and delete annotations in Pictograph JSON format
• Batch operations - Download entire datasets with parallel processing
• Automatic retries - Built-in retry logic for transient failures
• Rate limiting - Automatic handling of API rate limits
• Type hints - Full type annotations for better IDE support

Installation

pip install pictograph

Quick Start

from pictograph import Client

# Initialize the client with your API key
client = Client(api_key="pk_live_your_key_here")

# List all datasets
datasets = client.datasets.list()
for dataset in datasets:
    print(f"{dataset['name']}: {dataset['image_count']} images")

# Download a complete dataset
client.datasets.download(
    "dataset-uuid",
    output_dir="./my_dataset",
    mode="full"  # Download images + annotations
)

# Upload an image
result = client.images.upload(
    "dataset-uuid",
    "/path/to/image.jpg",
    folder_path="/train/images"
)
print(f"Uploaded: {result['image_id']}")

# Get annotations for an image
annotations = client.annotations.get("image-uuid")
for ann in annotations:
    print(f"{ann['class']}: {ann['type']}")

# Save annotations
client.annotations.save("image-uuid", [
    {
        "id": "ann-1",
        "class": "person",
        "type": "bbox",
        "bbox": [100, 200, 50, 80],  # [x, y, width, height]
        "confidence": 1.0
    }
])

Authentication

Get your API key from the Pictograph dashboard.

from pictograph import Client

client = Client(api_key="pk_live_your_key_here")

You can also configure the base URL and timeout:

client = Client(
    api_key="pk_live_your_key_here",
    base_url="https://your-instance.pictograph.cloud",
    timeout=60,
    max_retries=5
)

Usage

Working with Datasets

List Datasets

# List all datasets
datasets = client.datasets.list()

# With pagination
datasets = client.datasets.list(limit=50, offset=0)

Get Dataset Details

# Get basic info
dataset = client.datasets.get("dataset-uuid")
print(dataset['name'], dataset['image_count'])

# Get with images included
dataset = client.datasets.get(
    "dataset-uuid",
    include_images=True,
    images_limit=1000
)
for img in dataset['images']:
    print(img['filename'], img['image_url'])

List Images in Dataset

# List all images
images = client.datasets.list_images("dataset-uuid")

# Filter by annotation status
completed_images = client.datasets.list_images(
    "dataset-uuid",
    status="complete",
    limit=500
)

Download Dataset

# Download everything (images + annotations)
result = client.datasets.download(
    "dataset-uuid",
    output_dir="./dataset",
    mode="full",
    max_workers=20,  # Parallel downloads
    show_progress=True
)
print(f"Downloaded {result['images_downloaded']} images")

# Download only annotations
result = client.datasets.download(
    "dataset-uuid",
    output_dir="./annotations",
    mode="annotations_only"
)

# Download only completed images
result = client.datasets.download(
    "dataset-uuid",
    output_dir="./completed",
    mode="full",
    status_filter="complete"
)

Working with Images

Get Image Metadata

image = client.images.get("image-uuid")
print(image['filename'])
print(image['image_url'])  # CDN URL for viewing
print(image['annotation_count'])

Upload Image

# Simple upload
result = client.images.upload(
    "dataset-uuid",
    "/path/to/image.jpg"
)

# Upload to specific folder
result = client.images.upload(
    "dataset-uuid",
    "/path/to/image.jpg",
    folder_path="/train/images",
    filename="custom_name.jpg"
)

print(result['image_id'])

Delete Image

# Archive (soft delete)
client.images.delete("image-uuid")

# Permanent delete
client.images.delete("image-uuid", permanent=True)

Working with Annotations

Pictograph uses a JSON format that supports multiple annotation types:

• bbox - Bounding boxes [x, y, width, height]
• polygon - Polygons [[x1, y1], [x2, y2], ...]
• polyline - Polylines [[x1, y1], [x2, y2], ...]
• keypoint - Single points [x, y]

Get Annotations

annotations = client.annotations.get("image-uuid")
for ann in annotations:
    print(ann['id'], ann['class'], ann['type'])
    if ann['type'] == 'bbox':
        x, y, width, height = ann['bbox']
        print(f"  Bbox: ({x}, {y}) - {width}x{height}")

Save Annotations

# Bounding box
annotations = [
    {
        "id": "ann-1",
        "class": "person",
        "type": "bbox",
        "bbox": [100, 200, 50, 80],
        "confidence": 1.0
    }
]
result = client.annotations.save("image-uuid", annotations)
print(result['new_count'])

# Polygon
annotations = [
    {
        "id": "ann-2",
        "class": "car",
        "type": "polygon",
        "polygon": [[10, 20], [30, 40], [50, 60], [10, 20]],
        "confidence": 1.0
    }
]
client.annotations.save("image-uuid", annotations)

# Multiple annotations
annotations = [
    {"id": "ann-1", "class": "person", "type": "bbox", "bbox": [100, 200, 50, 80]},
    {"id": "ann-2", "class": "car", "type": "polygon", "polygon": [[10,20], [30,40], [50,60], [10,20]]},
    {"id": "ann-3", "class": "road", "type": "polyline", "polyline": [[0,100], [50,100], [100,100]]},
    {"id": "ann-4", "class": "landmark", "type": "keypoint", "keypoint": [150, 200]}
]
client.annotations.save("image-uuid", annotations)

Helper Methods

# Create properly formatted annotations
bbox = client.annotations.create_bbox(
    "ann-1",
    "person",
    [100, 200, 50, 80],
    confidence=0.95
)

polygon = client.annotations.create_polygon(
    "ann-2",
    "car",
    [[10, 20], [30, 40], [50, 60], [10, 20]]
)

polyline = client.annotations.create_polyline(
    "ann-3",
    "road",
    [[0, 100], [50, 100], [100, 100]]
)

keypoint = client.annotations.create_keypoint(
    "ann-4",
    "landmark",
    [150, 200]
)

# Save them all
client.annotations.save("image-uuid", [bbox, polygon, polyline, keypoint])

Delete Annotations

# Delete all annotations for an image
result = client.annotations.delete("image-uuid")
print(result['deleted_count'])

Context Manager

Use the client as a context manager to ensure proper cleanup:

with Client(api_key="pk_live_your_key_here") as client:
    datasets = client.datasets.list()
    # Client session automatically closed when done

Error Handling

The SDK raises specific exceptions for different error types:

from pictograph import Client, AuthenticationError, RateLimitError, NotFoundError

client = Client(api_key="pk_live_your_key_here")

try:
    dataset = client.datasets.get("invalid-uuid")
except AuthenticationError:
    print("Invalid API key")
except RateLimitError as e:
    print(f"Rate limited. Retry after {e.retry_after} seconds")
except NotFoundError:
    print("Dataset not found")
except Exception as e:
    print(f"Unexpected error: {e}")

Advanced Usage

Batch Processing

from concurrent.futures import ThreadPoolExecutor

# Upload multiple images in parallel
def upload_image(image_path):
    return client.images.upload("dataset-uuid", image_path)

image_paths = ["img1.jpg", "img2.jpg", "img3.jpg"]
with ThreadPoolExecutor(max_workers=10) as executor:
    results = list(executor.map(upload_image, image_paths))

print(f"Uploaded {len(results)} images")

Custom Metadata

# Add custom metadata to annotations
annotation = client.annotations.create_bbox(
    "ann-1",
    "person",
    [100, 200, 50, 80],
    metadata={
        "annotator": "[e-mail]",
        "difficulty": "easy",
        "verified": True
    }
)
client.annotations.save("image-uuid", [annotation])

Rate Limits

The SDK automatically handles rate limits:

• Free tier: 1,000 requests/hour
• Starter tier: 5,000 requests/hour
• Pro tier: 20,000 requests/hour
• Enterprise tier: 100,000 requests/hour

If you hit a rate limit, the SDK will automatically wait and retry (if retry time < 2 minutes).

Requirements

• Python 3.8+
• requests >= 2.31.0
• Pillow >= 10.0.0
• tqdm >= 4.65.0

Support

• Documentation: https://pictograph.cloud/docs
• Email: [e-mail]
• Issues: https://github.com/pictograph-labs/pictograph-sdk/issues

License

MIT License - see LICENSE file for details.