class_docstr: This class provides a set of methods to read, parse and answer
  questions about a single robots.txt file.
docstr: Sets the time the robots.txt file was last fetched to the
  current time.
docstr_tok: ["Sets","the","time","the","robots.txt","file","was","last","fetched","to","the","current","time","."]
code: def modified(self):
      """Sets the time the robots.txt file was last fetched to the
      current time.
  
      """
      import time
  
      self.last_checked = time.time()
  
imports: import collections
  import urllib.parse
  import urllib.request
label_desc: Use image node_id 3 for calling the RobotFileParser obj's underlying member method code with example usage: obj.modified() without return types