関連ワード:  numpy sort 2d array by column    numpy sort 2d array by first column    numpy sort 2d array by multiple columns    numpy sort 2d array by second column    numpy sort 2d array by one column    numpy sort 2d array by specific column    python sort 2d numpy array by column    python sort 2d numpy array by first column  
結果 : numpy sort 2d array by column