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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _ParseFile(self, file_obj, line_parser):
 """Process a file line by line. Args: file_obj: The file to parse. line_parser: The parser method used to process and store line content. Raises: parser.ParseError if the parser is unable to process the line. """

    lines = [
        l.strip() for l in utils.ReadFileBytesAsUnicode(file_obj).splitlines()
    ]
    try:
      for index, line in enumerate(lines):
        if line:
          line_parser(line)
    except (IndexError, KeyError) as e:
      raise parser.ParseError("Invalid file at line %d: %s" % (index + 1, e))