Question

您好我是python的新手，我想编写一个程序来读取csv文件并将数据写入另一个文件。

以下是代码：

    #!/usr/bin/python

import csv

FEED_FILE = '/proj/ctc/temp/sanjay/REC-754/20170529_MUREX_EOD_REC_RATES_20170531.csv'
OUT_FILE = '/proj/ctc/temp/sanjay/REC-754/20170529_MUREX_EOD_REC_RATES_20170531_out.csv'

with open(OUT_FILE, 'w', newline='') as outputfile:
    with open(FEED_FILE, newline='') as feed:
    writer = csv.writer(outputfile, delimiter=',', quotechar='"')
        reader = csv.reader(feed, delimiter=',', quotechar='"')
        for row in reader: 
        row[3] = sorted(list(row[3].split(','))
                writer.writerow(row)

但是我得到了以下错误，我无法理解为什么？

$./Csvreader.py
  File "./Csvreader.py", line 14
    writer.writerow(row)
         ^
SyntaxError: invalid syntax

请提前帮助我解决问题。

Answer 1

问题在于缩进！

with open(OUT_FILE, 'w', newline='') as outputfile:
    with open(FEED_FILE, newline='') as feed:
        writer = csv.writer(outputfile, delimiter=',', quotechar='"')
        reader = csv.reader(feed, delimiter=',', quotechar='"')
        for row in reader: 
            row[3] = sorted(list(row[3].split(','))
            writer.writerow(row)

编辑：对于您更新的问题，再次出现缩进问题！

此

           row[3] = sorted(list(row[3].split(','))
                writer.writerow(row)

应该是

                row[3] = sorted(list(row[3].split(','))
                writer.writerow(row)

Answer 2

请尝试以下代码：

with open(OUT_FILE, 'w', newline='') as outputfile:
    with open(FEED_FILE, newline='') as feed:
        writer = csv.writer(outputfile, delimiter=',', quotechar='"')
        reader = csv.reader(feed, delimiter=',', quotechar='"')
        for row in reader: 
            row[3] = sorted(list(row[3].split(',')))
            writer.writerow(row)

读取csv文件并使用python写入另一个文件

2 个答案: