code: def killworkers():
      with settings(warn_only=True):
          run("pkill -15 screen")
  
file_path: ATM/fabfile.py
imports: from __future__ import print_function
  from fabric.api import *
  from fabric.colors import green, yellow
  import boto.ec2
  import time
  from atm.config import AWSConfig
label_desc: Use image node_id 5 for calling a global function with example usage: killworkers() without return types