Question

我有2个CSV文件，其中包含3列，分别为“ num，” date”和“ tex”。

File1

num         date                tex   

20170512    12/05/2017 15:39    1001  

20170512    12/05/2017 15:39    1001 

20170908    08/09/2017 02:42    1001  

20170908    08/09/2017 06:30    1001

文件2

num              date                tex   

201705332212    12/05/2017 15:39    1001  

20170523212     12/05/2017 15:39    100156 

2017232320908   08/09/2017 02:42    10012  

20170908        08/09/2017 06:30    1001

所需的输出

diff.csv

num              date                tex   

201705332212    12/05/2017 15:39    1001  

20170523212     12/05/2017 15:39    100156 

2017232320908   08/09/2017 02:42    10012

我要同时匹配列“ num”和“ tex”。当前，下面的代码仅检查整个文件中的差异，而不是针对列“ num”和“ tex”。理想情况下，我希望“ num”和“ tex”两列都不相同时，我希望将其写入out.csv文件。

Answer 1

使用csv模块。

例如：

import csv

with open("file1.csv","rU") as file_0, open("file2.csv","rU") as file_1, open("out.csv", "w") as out_file:
    file_0 = csv.reader(file_0, delimiter=";")
    file_1 = csv.reader(file_1, delimiter=";")
    next(file_0)                                                   #Skip Header

    out_file_writer = csv.writer(out_file, delimiter=";")
    out_file_writer.writerow(next(file_1))                         #Writer Header

    for k, v in zip(file_0, file_1):
        if (k[0] != v[0]) or (k[-1] != v[-1]):
            out_file_writer.writerow(v)                            #Writer Diff

比较两个CSV文件中的列

1 个答案: