Python:将数据添加到第一个CSV列

Question

使用Python v2.7.4:

我有以下CSV文件:

Item Number,Item Description,List Price,QTY Available
2000-000-000-380,AC - CF/M Series Green For White Hood,299.99,3
2000-000-000-400,AC - CF/M Series Orange For Black Hood,299.99,3
2000-000-000-480,AC - CF/M Series Orange For White Hood,299.99,3

我一直在尝试将文件更改为:

Fulfillment,SKU,Qty
US,2000-000-300,3
US,2000-000-380,3
US,2000-000-400,3

到目前为止,我有以下代码:

import csv
import os

inputFileName = "temp_modified.csv"
outputFileName = os.path.splitext(inputFileName)[0] + "_pro.csv"

with open(inputFileName, "rb") as inFile, open(outputFileName, "wb") as outfile:
    r = csv.reader(inFile)    
    w = csv.writer(outfile)

    r.next()    
    w.writerow(['Fulfillment', 'SKU', 'Qty'])

    for row in r:
        w.writerow((row[0], row[3]))

使用此代码,我得到以下输出:

Fulfillment,SKU,Qty
2000-000-000-380,3
2000-000-000-400,3
2000-000-000-480,3

如何将US插入到开始列？(仅供参考,这些csv文件中不仅仅有3行,但是对于空间我遗漏了其余部分.)

Answer 1

只需在行中添加文字字符串:

for row in r:
    w.writerow(('US', row[0], row[3]))