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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_resources(genome, ref_file, data):
 """Retrieve genome information from a genome-references.yaml file. """

    base_dir = os.path.normpath(os.path.dirname(ref_file))
    resource_file = os.path.join(base_dir, "%s-resources.yaml" % genome.replace("-test", ""))
    if not os.path.exists(resource_file):
        raise IOError("Did not find resource file for %s: %s\n"
                      "To update bcbio_nextgen.py with genome resources for standard builds, run:\n"
                      "bcbio_nextgen.py upgrade -u skip"
                      % (genome, resource_file))
    with open(resource_file) as in_handle:
        resources = yaml.safe_load(in_handle)

    def resource_file_path(x):
        if isinstance(x, six.string_types) and os.path.exists(os.path.join(base_dir, x)):
            return os.path.normpath(os.path.join(base_dir, x))
        return x
    cleaned = utils.dictapply(resources, resource_file_path)
    return ensure_annotations(cleaned, data)