old_contents: #!/usr/bin/python
  from setup
  
  import os
  import setuptools
  
  def plus(os):
  	os.system("plus.py")
  def minus(os):
  	os.system("minus.py")
  def divide(os):
  	os.system("divide.py")
  def multi(os):
  	os.system("multi.py")
  def modulos(os):
  	os.system("modulos.py")
new_contents: #!/usr/bin/python
  import os
  
  def plus(os):
  	os.system("plus.py")
  def minus(os):
  	os.system("minus.py")
  def divide(os):
  	os.system("divide.py")
  def multi(os):
  	os.system("multi.py")
  def modulos(os):
  	os.system("modulos.py")
subject: Remove setuptools