How to trigger perl scrip in Django

I am Newbie.recently started with django,how to trigger simple Perl script in django project,

EX:

small script in perl or bash to do a hello world to a file

  echo "hello world" > /home/hello.txt

should be able to trigger the hello world script

  and see if the /home/hello.txt file has been created

How can i do this.........?

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