def unique(alist):
    result = []
    for item in alist:
        if item not in result:
            result.append(item)
    return result
Returns upload tracker URI, or None if the upload has not yet started.
dataset/ETHPy150Open ARM-software/workload-automation/wlauto/utils/misc.py/unique--crossover with--dataset/ETHPy150Open radlab/sparrow/deploy/third_party/boto-2.1.1/boto/gs/resumable_upload_handler.py/ResumableUploadHandler.get_tracker_uri