python中如何在矩阵中添加一列或是一行？？

例如文件t.data数据格式如下 1，2，3 4，5，6 7，8，9 //读入文件 file=open("t.data","r") //初始化矩阵 matrix=[] //读入数据并加到矩阵中 for line in file: line.strip() matrix.append(line.split(',')) //打印 print(matrix)

就是把插入行之后值重新输出来。

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

import xlwt

import xlrd

from xlutils.copy import copy

#styleBoldRed = xlwt.easyxf('font: color-index red, bold on')

#headerStyle = styleBoldRed

#wb = xlwt.Workbook()

#ws = wb.add_sheet('sheetName')

#ws.write(0, 0, "Col1",headerStyle)

#ws.write(0, 1, "Col2", headerStyle)

#ws.write(0, 2, "Col3",headerStyle)

#wb.save('fileName.xls')

#open existed xls file

oldWb = xlrd.open_workbook("fileName.xls", formatting_info=True)

oldWbS = oldWb.sheet_by_index(0)

newWb = copy(oldWb)

newWs = newWb.get_sheet(0)

inserRowNo = 1

newWs.write(inserRowNo, 0, "value1")

newWs.write(inserRowNo, 1, "value2")

newWs.write(inserRowNo, 2, "value3")

for rowIndex in range(inserRowNo, oldWbS.nrows):

for colIndex in range(oldWbS.ncols):

newWs.write(rowIndex + 1, colIndex, oldWbS.cell(rowIndex, colIndex).value)

newWb.save('fileName.xls')

print "save with same name ok"

这是一个把最后一列重复一次的例子：

import csv

with open('test.csv') as csvfile:    rows = csv.reader(csvfile)    with open('test1.csv','w', newline='') as f:        writer = csv.writer(f)        for row in rows:           row.append(row[len(row)-1])           writer.writerow(row)

Python是纯粹的自由软件， 源代码和解释器CPython遵循 GPL(GNU General Public License)协议[2]  。Python语法简洁清晰，特色之一是强制用空白符(white space)作为语句缩进。

---