code: def parseFile( self, file_or_filename, parseAll=False ):
          
          try:
              file_contents = file_or_filename.read()
          except AttributeError:
              with open(file_or_filename, "r") as f:
                  file_contents = f.read()
          try:
              return self.parseString(file_contents, parseAll)
          except ParseBaseException as exc:
              if ParserElement.verbose_stacktrace:
                  raise
              else:
                  # catch and re-raise exception from here, clears out pyparsing internal stack trace
                  raise exc
docs: Execute the parse expression on the given file or filename.
          If a filename is specified (instead of a file object),
          the entire file is opened, read, and closed before parsing.