code: def _execute_pip(self, args, log=True):
          
  
          # Copy the pip calling arguments so they can be extended
          exec_args = list(self._pip)
  
          # Older versions of pip don't support the version check argument.
          # Fixes https://github.com/sjkingo/virtualenv-api/issues/35
          if self.pip_version[0] >= 6:
              exec_args.append('--disable-pip-version-check')
  
          exec_args.extend(args)
          return self._execute(exec_args, log=log)
docs: Executes pip commands.
  
          :param args: Arguments to pass to pip (list[str])
          :param log: Log the output to a file [default: True] (boolean)
          :return: See _execute