def _retrieve_instance_region()

in docker/build_artifacts/deep_learning_container.py [0:0]

• 13 lines of code
• 3 McCabe index (conditional complexity)

def _retrieve_instance_region():
    """
    Retrieve instance region from instance metadata service
    """
    region = None
    valid_regions = ['ap-northeast-1', 'ap-northeast-2', 'ap-southeast-1', 'ap-southeast-2',
                     'ap-south-1', 'ca-central-1', 'eu-central-1', 'eu-north-1',
                     'eu-west-1', 'eu-west-2', 'eu-west-3', 'sa-east-1',
                     'us-east-1', 'us-east-2', 'us-west-1', 'us-west-2']

    url = "http://169.254.169.254/latest/dynamic/instance-identity/document"
    response = requests_helper(url, timeout=0.1)

    if response is not None:
        response_json = json.loads(response.text)

        if response_json['region'] in valid_regions:
            region = response_json['region']

    return region