在python中用双引号将每个逗号分隔的CSV字段括起来

Question

我正在尝试使用 csv 模块将每个字段值括在双引号中。 但这里的诀窍是我们在需要跳过的值之间有逗号。 这是我用来将值括在引号中的 sn-p。

数据：

col1,col2
first row,This section of the badge focuses on Communications
second row,Feedback has partnered with team members, leaders, and executives receive confidential, anonymous feedback

代码sn-p

import csv

with open('data.csv') as input, open('out.csv','w') as output:
    reader = csv.reader(input)
    writer = csv.writer(output, delimiter=',', quoting=csv.QUOTE_ALL)
    for line in reader:
        writer.writerow(line)

输出

"col1","col2"
"first row","This section of the badge focuses on Communications"
"second row","Feedback has partnered with team members"," leaders"," and executives receive confidential"," anonymous feedback"

预期输出

"col1","col2"
"first row","This section of the badge focuses on Communications"
"second row","Feedback has partnered with team members, leaders, and executives receive confidential, anonymous feedback"

Answer 1

由于输入数据不是常规的 CSV 文件，使用csv 模块读取输入文件可能会出现问题。 要解决这个问题，你可以直接读取文件的行，然后解析如下：

import csv

with open('data.csv') as fin, open('out.csv','w') as fout:
    writer = csv.writer(fout, delimiter=',', quoting=csv.QUOTE_ALL)
    for line in fin:
        writer.writerow(line.rstrip().split(',', 1))

Answer 2

您可以将DictReader 和DictWriter 与restkey 属性一起使用：

with open('data.csv') as inp, open('out.csv', 'w') as out:
    reader = csv.DictReader(inp, restkey='colN')
    writer = csv.DictWriter(out, fieldnames=reader.fieldnames,
                            delimiter=',', quoting=csv.QUOTE_ALL)
    writer.writeheader()
    for line in reader:
        line[reader.fieldnames[-1]] += ','.join(line.pop('colN', []))
        writer.writerow(line)

out.csv的内容：

"col1","col2"
"first row","This section of the badge focuses on Communications"
"second row","Feedback has partnered with team members leaders, and executives receive confidential, anonymous feedback"