如何通过python循环执行linux命令

Question

I have a list of files which will be used to extract by another linux script like this:

gzip -dc input/test_log.gz | bin/recreate state/object_mappings.sort > output/recreate.out

I need to change the name test_log.gz with my list of files with python loop, how can I execute this script dynamically. here is my code:

import os
from subprocess import call

files = os.listdir("/my directory/")
files.sort()
for i in files:
    call('gzip -dc input/test_log.gz | bin/recreate state/object_mappings.sort > output/recreate.out')

I dont know how to change this script with dynamic variable i??

Answer 1

You can use an f-string literal:

import os
from subprocess import call

files = os.listdir("/my directory/")
files.sort()
for file in files:
    call(f'gzip -dc {os.path.abspath(file)} | bin/recreate state/object_mappings.sort > output/recreate.out')

Answer 2

In my case the below method works.

from subprocess import call

files = ['input.txt', 'input1.txt', 'input2.txt', 'input3.txt']

for file in files:
    call(['sed', '-i', 's+NameToBeReplaced+NewName+', file])

• sed : is stream editor

• -i : Allows to edit the source file

• + : Is delimiter.

• call : Takes command in array format.

For example: if you want to run ls -l input.txt

call(['ls', '-l', file])

I hope the above information works for you 😃.