関連ワード:  python find number of unique values in list    python get number of unique values in list    python find unique values in list    python count of unique values in list    python find all unique values in list    python find non unique values in list    python find not unique values in list    python get list of unique values in list    python check unique values in list    python get unique values in list preserve order  
結果 : python find number of unique values in list