creating multiple file using os python

Question

Hi folks I am using ros noetic and i have to create 12 file name as x.bag and x ranging upto 12. code is following.

import rospy
import os
for x in range(12): 
    cmd='rosbag record -o /home/mubashir/catkin_ws/src/germany1_trush/rosbag/x.bag /web_cam --duration 5 '
    os.system(cmd)

how I get vlaue of x in cmd.

creating 12 file of 5sec duration using os.while having different name i am not able to acess value of x inside cmd

keithpjolley · Accepted Answer · 2022-11-24 16:30:29Z

1

I'm not sure I understand your question exactly. I think what you want is to run the following command 12 times (from 0 to 11):

import rospy
import os
for x in range(12): 
    cmd = f'rosbag record -o /home/mubashir/catkin_ws/src/germany1_trush/rosbag/{x}.bag /web_cam --duration 5'
    os.system(cmd)

You probably want 1..12 which you can easily do with {x + 1}.

BTW, this is called a "Literal String Interpolation", aka f-string. Pretty handy.

answered Nov 24, 2022 at 16:30

keithpjolley

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