関連ワード:  python turn list of lists into list    python convert list of lists into list    python turn list of lists into one list    python turn list of lists into single list    python convert list of lists to list of tuples    python convert list of lists to single list    python convert list of lists to one list    python convert list of lists to list of strings    python convert list of lists to list of dictionaries    python turn list of tuples into list of lists