python字符串矩阵 如何取其中的一列或几列?答:matrix = ["abcde","fghij","klmno","pqrst","uvwxy"]取第一列 column1 = [row[0] for row in matrix]print(column1) # 输出: ['a', 'f', 'k', 'p', 'u']取第二和第三列 column2_3 = [row[1:3] for row in matrix]print(column2_3) # 输出: ['bc', 'gh', '...
python怎么选取某几列为特定值?答:一、采用双下标 nums = [ [1,2,3],[4,5,6],[7,8,9]]Num = []for i in range(len(nums)):for m in range(len(nums[0])):Num.append(nums[m,i]) #本循环 列号不变 print(Num)这样就取到了第0列,第1列,第2列 二、使用Jupyter notebook ...