Python - Read value of variable from file

Question

In bash, I have a file that stores my passwords in variable format.

e.g.

cat file.passwd
password1=EncryptedPassword1
password2=EncryptedPassword2

Now if I want to use the value of password1, this is all that I need to do in bash.

grep password1 file.passwd  | cut -d'=' -f2

I am looking for an alternative for this in python. Is there any library that gives functionality to simply extract the value or do we have to do it manually like below?

with open(file, 'r') as input:
         for line in input:
             if 'password1' in line:
                 re.findall(r'=(\w+)', line)

Possible duplicate of [Parse key value pairs in a text file](http://stackoverflow.com/questions/9161439/parse-key-value-pairs-in-a-text-file) — Darrick Herwehe, Apr 18 '17 at 14:28

bhansa · Accepted Answer · 2017-04-18T14:31:22.627

1

Read the file and add the check statement:

if line.startswith("password1"):
    print re.findall(r'=(\w+)',line)

Code:

import re
with open(file,"r") as input:
    lines = input.readlines()
    for line in lines:
        if line.startswith("password1"):
            print re.findall(r'=(\w+)',line)

edited Apr 18 '17 at 14:31

answered Apr 18 '17 at 14:19

bhansa

7,282
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Why not just `for line in input:`? (Although giving `input` a different name so it didn't overwrite the built-in would be good) – Simon Fraser Apr 18 '17 at 14:41
just to give a simple approach here. although should use different name. – bhansa Apr 18 '17 at 15:58

score 0 · Answer 2 · answered Apr 18 '17 at 14:16

0

There's nothing wrong with what you've written. If you want to play code golf:

line = next(line for line in open(file, 'r') if 'password1' in line)

answered Apr 18 '17 at 14:16

Ben Quigley

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4
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line = next(line.strip().split('=')[1] for line in open('mout.txt', 'r') if 'password1' in line) if you just want the password returned – Chris Apr 18 '17 at 14:19

score 0 · Answer 3 · answered Apr 18 '17 at 14:36

0

I found this module very useful ! Made life much easier.

answered Apr 18 '17 at 14:36

1

Do not consider adding only links in your solution, there are prone to be removed. – bhansa Sep 29 '17 at 10:53

Python - Read value of variable from file

3 Answers3