関連ワード:  python number of unique elements in a list    python number of unique values in a list    python count unique elements in a list    python count number of unique elements in list    python count of distinct values in a list    python number of elements in a list    python unique elements in a list    python number of items in a list    python get number of elements in a list    python count number of elements in a list  
結果 : python number of unique elements in a list