関連ワード:  get number of unique values in list python    count number of unique elements in list python    get number of elements in list python    number of unique elements in list python    get unique elements in list python    get count of elements in list python    count of unique elements in list python    get list of unique values in list python    find unique elements in list python    get count of each element in list python  
結果 : get number of unique elements in list python