how to split file lines based on comma and concatenate new string

Question

I have a file which has lines like below, Files are in /tmp/file

            cat /tmp/file
            server1,server2
            server4,server4

I want to concatenate each line to new word ".com" so it will look like below. When i covert this and split it doesn't work , Please guide

        newfile = server1.com,server2.com
                  server3.com,server4.com



            with open('/tmp/file', 'r') as file1:
                   newline = ''
                   for line in file1:
                       y = line.split()
                       print(y)
                   for line in y:
                       z = str(y).split(',')
                       print(z)
                       newline = str(z)+".com".join('' )
                   print(newline)

Results :

            ['server1,server2']
            ['server3,server4']
            ["['server3", "server4']"]
            ["['server3", "server4']"]

Expected : server1.com,server2.com server3.com,server4.com

','.join([f"{j}.com" for i in p.read_text().splitlines() for j in i.split(',')])(where p is pathlib.Path object.) — user459872
– user459872, Commented Jun 23, 2019 at 5:37
Please add explanation . This seems not working. ','.join([f"{j}.com" for i in p.read_text().splitlines() for j in i.split(',')]) File "<ipython-input-100-f0280c232ed5>", line 1 ','.join([f"{j}.com" for i in p.read_text().splitlines() for j in i.split(',')]) ^ SyntaxError: invalid syntax — Abhimanyu
– Abhimanyu, Commented Jun 23, 2019 at 5:51
Python3 , I do have 2.7 as well. In [110]: with open('/tmp/file', 'r') as file1: ...: for i in file1.read().splitlines(): ...: print(i) ...: for j in i.split(','): ...: k = j.splitlines() ...: abc = ",".join([k+".com"]) ...: print(abc) Error: TypeError: can only concatenate list (not "str") to list — Abhimanyu
– Abhimanyu, Commented Jun 23, 2019 at 6:04

krishna reddy · Accepted Answer · 2019-06-24 20:52:48Z

2

with open('/tmp/file', 'r') as r:
    for line in r:
        newline = line.strip()
        newline = newline.split(',')
        for i in range(len(newline)):
            newline[i] = newline[i] + ".com"
        newline = ",".join(newline)
        print newline

This code can be optimized a lot. But this is for better understanding

edited Jun 24, 2019 at 20:52

answered Jun 23, 2019 at 6:25

krishna reddy

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