in python can write below in single if condition?

Question

How can I rewrite the below code using only single if condition instead of two if conditions in Python 3.7?

with open('demo.csv', 'r') as f, open("Result_csv.csv", 'w+') as out:
    for line in f:
        if '/tcp' in line:
            print(line)
            out.write(line)
        if '/udp' in line:
            print(line)
            out.write(line)

yes, just use an `or`. (Unless it's important to output the line twice if it contains both strings.) — Robin Zigmond, Jan 09 '19 at 08:55

NemoMeMeliorEst · Answer 1 · 2019-01-09T09:10:13.320

5

with open('demo.csv', 'r') as f, open("Result_csv.csv", 'w+') as out:
    for line in f:
        if '/tcp' in line or '/udp' in line:
            print(line)
            out.write(line)

edited Jan 09 '19 at 09:10

answered Jan 09 '19 at 08:57

NemoMeMeliorEst

513
4
10

thanks... its works.... – Gali Ashok Jan 09 '19 at 09:00
please accept as solution if it works, upvoting helps ;) – NemoMeMeliorEst Jan 09 '19 at 09:01
1

By the way, the parentheses are unneeded. – iz_ Jan 09 '19 at 09:02
yes i know. just to make it clearer ;) – NemoMeMeliorEst Jan 09 '19 at 09:02
2

The parentheses arguably make it less clear and also violate style guides, but it still works fine. – iz_ Jan 09 '19 at 09:04
edited to keep us all happy :D – NemoMeMeliorEst Jan 09 '19 at 09:10

Venkatachalam · Answer 2 · 2019-01-09T09:37:14.027

1

You could also use regular expression to search multiple substrings.

import re
with open('demo.csv', 'r') as f, open("Result_csv.csv", 'w+') as out:
    for line in f:
        if re.search('/tcp|/udp', line):
            print(line)
            out.write(line)

edited Jan 09 '19 at 09:37

answered Jan 09 '19 at 09:29

Venkatachalam

16,288
9
49
77

in python can write below in single if condition?

2 Answers2