需要使用Shell根据csv中的特定列检查和更新行

Question

我需要根据该列更改csv的值，

csv1：

Account User login status    
guh     guhan 1     upload   
nav     Naveen 2    complete 

csv2：

Account User login status     
guh     guhan 1     complete    
nav     Naveen 2    complete 

输出csv：

guh     guhan 1     complete    
nav     Naveen 2    complete 

由于第一行是csv的标题，因此需要从第二行进行检查。

while IFS="," read Account User login status    
if [ $status in csv1 = $status in csv2 ]    
dont change     
if [$ status in csv1 != $staus in csv2 ] 
change the status value

请帮助我

Answer 1

如果您接受Python中的解决方案，那么您在这里：

将csv1.csv赋予

Account,User,login,status
guh,guhan,1,upload
nav,Naveen,2,complete

和csv2.csv为

Account,User,login,status
guh,guhan,1,complete
nav,Naveen,2,complete

您可以运行以下脚本output.py：

#!/usr/bin/env python3
# Update status information from csv1 according to csv2

import csv

with open('csv1.csv') as cf:
    reader = csv.DictReader(cf)
    fieldnames = reader.fieldnames
    rows1 = [ r for r in reader ]
with open('csv2.csv') as cf:
    rows2 = [ r for r in csv.DictReader(cf) ]

KEY_FIELDS = ['Account','User','login']
FIELD_TO_UPDATE = 'status'
OVERWRITE_STATUS = 'complete'

with open('output.csv','w') as cf:
    writer = csv.DictWriter(cf, fieldnames=fieldnames)
    writer.writeheader()
    for r1 in rows1:
        r_new = r1
        for r2 in rows2:
            if all([ r1[f] == r2[f] for f in KEY_FIELDS ]):
                if r2[FIELD_TO_UPDATE] == OVERWRITE_STATUS:
                    r_new[FIELD_TO_UPDATE] = OVERWRITE_STATUS
        writer.writerow(r_new)

这将为您提供文件output.py：

Account,User,login,status
guh,guhan,1,complete
nav,Naveen,2,complete

注意事项：此脚本非常很基本，并且无法缩放到大型文件csv1.csv和csv2.csv。