How to find parenthesis bound strings in python

Question

I'm learning Python and wanted to automate one of my assignments in a cybersecurity class. I'm trying to figure out how I would look for the contents of a file that are bound by a set of parenthesis. The contents of the (.txt) file look like:

cow.jpg : jphide[v5](asdfl;kj88876)
fish.jpg : jphide[v5](65498ghjk;0-)
snake.jpg : jphide[v5](poi098*/8!@#)
test_practice_0707.jpg : jphide[v5](sJ*=tT@&Ve!2)
test_practice_0101.jpg : jphide[v5](nKFdFX+C!:V9)
test_practice_0808.jpg : jphide[v5](!~rFX3FXszx6)
test_practice_0202.jpg : jphide[v5](X&aC$|mg!wC2)
test_practice_0505.jpg : jphide[v5](pe8f%yC$V6Z3)
dog.jpg : negative`

And here is my code so far:

import sys, os, subprocess, glob, shutil

# Finding the .jpg files that will be copied.
sourcepath = os.getcwd() + '\\imgs\\'
destpath = 'stegdetect'
rawjpg = glob.glob(sourcepath + '*.jpg')

# Copying the said .jpg files into the destpath variable
for filename in rawjpg:
    shutil.copy(filename, destpath)

# Asks user for what password file they want to use.
passwords = raw_input("Enter your password file with the .txt extension:")
shutil.copy(passwords, 'stegdetect')

# Navigating to stegdetect. Feel like this could be abstracted.
os.chdir('stegdetect')

# Preparing the arguments then using subprocess to run
args = "stegbreak.exe -r rules.ini -f " + passwords + " -t p *.jpg"

# Uses open to open the output file, and then write the results to the file.
with open('cracks.txt', 'w') as f: # opens cracks.txt and prepares to w
        subprocess.call(args, stdout=f)

# Processing whats in the new file.
f = open('cracks.txt')

Answer 1

If it should just be bound by ( and ) you can use the following regex, which ensures starting ( and closing ) and you can have numbers and characters between them. You can add any other symbol also that you want to include.

[\(][a-z A-Z 0-9]*[\)]

[\(] - starts the bracket
[a-z A-Z 0-9]* - all text inside bracket
[\)] - closes the bracket

So for input sdfsdfdsf(sdfdsfsdf)sdfsdfsdf , the output will be (sdfdsfsdf) Test this regex here: https://regex101.com/