class_docstr: Parser for command line arguments and ini-file values.
  
  :ivar extra_info: dict of generic param -> value to display in case
      there's an error processing the command line arguments.
docstr: parses and returns a namespace object with known arguments at this
  point.
docstr_tok: ["parses","and","returns","a","namespace","object","with","known","arguments","at","this","point","."]
code: def parse_known_args(self, args, namespace=None):
      """parses and returns a namespace object with known arguments at this
      point.
      """
      return self.parse_known_and_unknown_args(
          args, namespace=namespace
      )[0]
  
imports: import argparse
  import warnings
  import py
  import six
  from _pytest.config.exceptions import UsageError
label_desc: Use image node_id 8 for calling the Parser obj's underlying member method code with example usage: obj.parse_known_args(args, namespace) and returns: self