Random Resource Access with PyVISA

This function uses the PyVISA library to randomly select a resource type (GPIB, ASRL, TCPIP), then randomly select a resource from that type for connection, query its ID information, and finally close the resource.

Technology Stack : PyVISA

Code Type : The type of code

Code Difficulty : Intermediate

                
                    
import random
import visa

def random_resource_access(resource_type):
    """
    Access a random resource of a given type using PyVISA.
    """
    # List of supported resource types
    resource_types = ['GPIB', 'ASRL', 'TCPIP']

    # Randomly select a resource type from the list
    selected_resource_type = random.choice(resource_types)

    # Create a ResourceManager instance
    rm = visa.ResourceManager()

    # Query all resources of the selected type
    resources = rm.list_resources(selected_resource_type)

    # If there are resources, randomly select one
    if resources:
        selected_resource = random.choice(resources)
    else:
        raise Exception(f"No resources found of type {selected_resource_type}")

    # Open the selected resource
    resource = rm.open_resource(selected_resource)

    # Perform a simple query to test the connection
    result = resource.query("*IDN?")

    # Close the resource
    resource.close()

    return result