関連ワード:  python sort list of tuples on first element    python sort list of tuples based on first element    python sort list of tuples by first element descending    python sort list of tuples by first and second element    python sort list of tuples by first then second element    python sort list of tuples by first and second element descending    sort list of tuples by first element  
結果 : python sort list of tuples on first element