def create_arg_parser():
    """
    Many of the argument defaults are used as arg_parser makes it easy to
    use defaults. The user has many options they can select.
    """

    parser = argparse.ArgumentParser(description='Process some inputs')
    # script to run pytest
    parser.add_argument("--test",
                        action="store",
                        default="./tests/ci/run_pytest.py",
                        help="location of script to run pytest")
    # test folder
    parser.add_argument("--testfolder",
                        action="store",
                        default="./tests/unit",
                        help="folder where tests are stored")
    # pytest test markers
    parser.add_argument("--testmarkers",
                        action="store",
                        default="not notebooks and not spark and not gpu",
                        help="pytest markers indicate tests to run")
    # test summary file
    parser.add_argument("--junitxml",
                        action="store",
                        default="reports/test-unit.xml",
                        help="file for returned test results")
    # max num nodes in Azure cluster
    parser.add_argument("--maxnodes",
                        action="store",
                        default=4,
                        help="specify the maximum number of nodes for the run")
    # Azure resource group
    parser.add_argument("--rg",
                        action="store",
                        default="recommender",
                        help="Azure Resource Group")
    # AzureML workspace Name
    parser.add_argument("--wsname",
                        action="store",
                        default="RecoWS",
                        help="AzureML workspace name")
    # AzureML clustername
    parser.add_argument("--clustername",
                        action="store",
                        default="amlcompute",
                        help="Set name of Azure cluster")
    # Azure VM size
    parser.add_argument("--vmsize",
                        action="store",
                        default="STANDARD_D3_V2",
                        help="Set the size of the VM either STANDARD_D3_V2")
    # cpu or gpu
    parser.add_argument("--dockerproc",
                        action="store",
                        default="cpu",
                        help="Base image used in docker container")
    # Azure subscription id, when used in a pipeline, it is stored in keyvault
    parser.add_argument("--subid",
                        action="store",
                        default="123456",
                        help="Azure Subscription ID")
    # ./reco.yaml is created in the azure devops pipeline.
    # Not recommended to change this.
    parser.add_argument("--condafile",
                        action="store",
                        default="./reco.yaml",
                        help="file with environment variables")
    # AzureML experiment name
    parser.add_argument("--expname",
                        action="store",
                        default="persistentAML",
                        help="experiment name on Azure")
    # Azure datacenter location
    parser.add_argument("--location",
                        default="EastUS",
                        help="Azure location")
    # github repo, stored in AzureML experiment for info purposes
    parser.add_argument("--reponame",
                        action="store",
                        default="--reponame MyGithubRepo",
                        help="GitHub repo being tested")
    # github branch, stored in AzureML experiment for info purposes
    parser.add_argument("--branch",
                        action="store",
                        default="--branch MyGithubBranch",
                        help=" Identify the branch test test is run on")
    # github pull request, stored in AzureML experiment for info purposes
    parser.add_argument("--pr",
                        action="store",
                        default="--pr PRTestRun",
                        help="If a pr triggered the test, list it here")

    args = parser.parse_args()

    return args