我需要替换CSV文件中的列标题,我不知道列的顺序或数量。例如,文件可能如下所示:
DN cn sn Name mail depart mobile
data1 data2 data3 data4 data5 data6 data7
或者
DN cn depart mobile sn
data1 data2 data3 data4 data5
我需要复制一列并创建一个新标题,因此最终输出看起来像这样(注意数据1重复):
user email phone depar mobile sn
data1 data1 data2 data3 data4 data5
我要用这一个圆圈。使用
import csv
with open('test.csv', 'rb') as csvfile:
r = csv.reader(csvfile, delimiter=',', quotechar='"')
headers=r.next()
for index, heading in enumerate(headers):
if heading == 'mail':
headers[index] = "Username"
我可以很好地更改列标题,并将其写入新文件或现有文件,但是如何添加额外列?
感谢abarnert在下面的回答,我现在使用的代码就像魅力一样:
import csv
with open('test.csv', 'rb') as infile, open('out.csv', 'wb') as outfile:
r = csv.reader(infile, delimiter=',', quotechar='"')
headers=r.next()
for index, heading in enumerate(headers):
if heading == 'mail':
headers[index] = "WorkEmail"
username_index = index
headers.insert(username_index, 'Username')
w = csv.writer(outfile, delimiter=',', quotechar='"')
w.writerow(headers)
for row in r:
if len(row) >= username_index:
row.insert(username_index, row[username_index])
w.writerow(row)
答案 0 :(得分:3)
您需要做的就是跟踪找到要复制的列的位置,然后添加它。例如:
# ...
# for ...
if heading == 'mail':
headers[index] = "Username"
elif heading == 'data1':
data_1_index = index
headers.insert(data_1_index, 'data1')
我假设你也想要复制每行中的值。但那也很容易。
for row in r:
row.insert(data_1_index, row[data_1_index])
w.writerow(row)
总而言之,这是一个完整的程序,可以完成您想要的任务(
)import csv
with open('test.csv', 'rb') as infile, open('out.csv', 'wb') as outfile:
r = csv.reader(infile, delimiter=',', quotechar='"')
headers=r.next()
for index, heading in enumerate(headers):
if heading == 'mail':
headers[index] = "Username"
elif heading == 'data1':
data_1_index = index
headers.insert(data_1_index, 'data1')
w = csv.writer(outfile, delimiter=',', quotechar='"')
w.writerow(headers)
for row in r:
row.insert(data_1_index, row[data_1_index])
w.writerow(row)