Python3 sys.stdout.write delete last line

Question

ip.txt

127.0.0.1
127.0.0.10
127.0.0.15

Code

user@linux:~$ cat script01.py 
with open('ip.txt', 'r') as f:
    for line in f:
        print(line)
user@linux:~$

Output

user@linux:~$ python script01.py 
127.0.0.1

127.0.0.10

127.0.0.15
user@linux:~$

One of the solution provided to remove additional new line was to use sys.stdout.write instead of print

Python is adding extra newline to the output

New code with sys.stdout.write

user@linux:~$ cat script02.py 
import sys

with open('ip.txt', 'r') as f:
    for line in f:
        # print(line)
        sys.stdout.write(line)
user@linux:~$

However, sys.stdout.write delete the last line.

user@linux:~$ python script02.py 
127.0.0.1
127.0.0.10
127.0.0.15user@linux:~$

How to fix this problem?

Niranjan Kumar · Accepted Answer · 2020-04-07 06:51:06Z

1

Use

with open('ip.txt', 'r') as f:
    for line in f:
        print(line, end='')

answered Apr 7, 2020 at 6:51

Niranjan Kumar

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Comments

bb1950328 · Accepted Answer · 2020-04-07 07:15:40Z

0

You can use the function strip() to remove the line break:

with open('ip.txt', 'r') as f:
    for line in f:
        print(line.strip("\r\n"))

The argument "\r\n" makes the function to only delete all newlines and carriage returns at the beginnig and end of the line. Without that argument it would also delete spaces and tabs at the beginning and end what you might not want.

answered Apr 7, 2020 at 7:15

bb1950328

1,63418 silver badges23 bronze badges

2 Comments

user9013730 Over a year ago

Thanks @Sadap. print(line.strip()) also produce similar output

bb1950328 Over a year ago

Yes, the output is similar as long as you don't have spaces or tabs at the beginning or at the end

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