XTablesClient 5.2.3

A high-performance Python client for real-time management of XTablesServer network tables, designed for robotics and complex data-driven systems.

XTablesClient

XTablesClient is a Python client library designed to interact with the XTables server, allowing you to send and receive messages, subscribe to updates, and manage communication through ZeroMQ (ZMQ) sockets. The client supports publishing, subscribing, and retrieving various data types (strings, integers, booleans, arrays, and more) to/from the server.

Features

• Socket Communication: Uses ZeroMQ for push, request, and subscription communication with the XTables server.
• Subscription Management: Allows subscribing to specific keys or to all updates.
• Multiple Data Types: Supports sending and receiving a variety of data types, including strings, integers, booleans, arrays, and raw bytes.
• mDNS Support: Automatically resolves the server's IP address using Zeroconf if the hostname is not provided.

Installation

To install XTablesClient, simply use pip:

pip install XTablesClient

Usage

Basic Example

from XTablesClient import XTablesClient

# Initialize the client
client = XTablesClient()

# Publish a string message
client.publish("some_key", b"Hello, XTables!")

# Subscribe to a key and handle incoming messages
def message_handler(message):
    print(f"Received message for key: {message.key} with value: {message.value}")

client.subscribe("some_key", message_handler)

# Retrieve data
data = client.getString("some_key")
print(data)

Available Methods

Publishing Data

• publish(key: str, value: str): Publish a string value to the server.
• putString(key: str, value: str): Put a string value in the XTable.
• putInteger(key: str, value: int): Put an integer value.
• putBoolean(key: str, value: bool): Put a boolean value.

Subscribing to Updates

• subscribe(key: str, consumer: Callable): Subscribe to updates for a specific key.
• subscribe_all(consumer: Callable): Subscribe to updates for all keys.

Retrieving Data

• getString(key: str): Get a string value from the server.
• getInteger(key: str): Get an integer value.
• getBoolean(key: str): Get a boolean value.
• getArray(key: str): Get an array of values.

Documentation

• XTablesClient is built with simplicity in mind and uses ZeroMQ for efficient communication with the XTables server. It can be easily extended or modified for custom use cases.
• The package uses Zeroconf to automatically discover the server in your network if the IP is not provided.

License

XTablesClient is licensed under the MIT License. See the LICENSE file for more details.