def base_arguments(source="/tmp", target="/tmp", start=None, end=None, glob="*"):
    """Builds the base arguments dictionary

    Args:
     source (str): the source directory of the packets
     target (str): the target directory for the output
     start (str): the time for the earliest packets
     end (str): the time for the latest packets
     glob (str): file-glob for the source files

    Returns:
     dict: arguments for the GetPackets Constructor
    """    
    return dict(source=source,
                target=target,
                start=start,
                end=end,
                source_glob=glob)