如何用python交换csv文件中的行？

Question

我有 11k 个 csv 文件，其中只有两行它们看起来像这样

---------------------------
             | A0.31       |
---------------------------
some data    |             |
---------------------------

我只希望它们在一行中

---------------------------
some data    | A0.31       |
---------------------------

我有这段代码，但它只是替换了没有将它们放在一行中的值

import csv, os

with open('path/to/filename') as inf, open('path/to/filename_temp', 'w') as outf:
    reader = csv.reader(inf)
    writer = csv.writer(outf)
    for line in reader:
        if line[1] == '0':
           ...
        ... # as above

os.remove('path/to/filename')
os.rename('path/to/filename_temp', 'path/to/filename')

Answer 1

这应该可以解决问题。

#!python
value=""
data=""
with open("test.csv","r") as inF, open("out.csv","w") as outF:
    lines= inF.readlines()
    for line in lines:
        if "-" in line:
            continue
        if line.isspace():
            continue
        fields=line.split("|")
        if not fields[1].isspace():
            value=fields[1]
        elif not fields[0].isspace():
            data=fields[0]
        else:
            continue
    outF.write("-------------------------------------\n")
    outF.write(data +"|" + value+ "|" +"\n")
    outF.write("-------------------------------------\n")

Answer 2

您指出您的文件是 CSV，所以我假设您的文件实际上是 CSV 格式，即如下：

,'A0.31'
'some data',

如果您的文件真的那么短，我只需在文件中加载两行，然后立即将组合结果写入同一个文件：

import csv

data = []
with open('path/to/filename') as inf:
    reader = csv.reader(inf)
    for row in reader:
        data.append(row)

with open('path/to/filename', 'w') as outf:
    writer = csv.writer(outf)
    writer.writerow([data[1][0], data[0][1]])