import subprocess
def grep(filename, arg):
process = subprocess.Popen(['grep', '-n', arg, filename], stdout=subprocess.PIPE)
stdout, stderr = process.communicate()
return stdout, stderr
import subprocess
def grep(filename, arg):
process = subprocess.Popen(['grep', '-n', arg, filename], stdout=subprocess.PIPE)
stdout, stderr = process.communicate()
return stdout, stderr