text: #!/usr/bin/env python3
  
  import os 
  import json
  
  # print out all ENV variables as plain text
  
  # print ("Content-Type: text/plain") #let the browser know to expect plain text
  # print ()
  # print (os.environ)
  
  
  # print env variables as json
  
  # print ("Content-Type: application/json") #let the browser know to expect json
  # print ()
  # print (json.dumps(dict(os.environ), indent=2))  #print w/ nice formatting
  
  #print query parameter data in HTML
  
  print ("Content-Type: text/html")    #let the browser know to expect html
  print ()
  print (f"<p> Qeuery_STRING = {os.environ['QUERY_STRING']}</p>")
  print()
  print (f"<p> Qeuery_STRING = {os.environ['HTTP_USER_AGENT']}</p>")
  