code: def convert(self, line=None, is_end=True):
          
          if line is not None:
              self.line = line
          if not self.line:
              raise TomlDecodeError(self.parser.lineno,
                                    'EOF is hit!')
          token = None
          self.line = self.line.lstrip()
          for key, pattern in self.patterns:
              m = pattern.match(self.line)
              if m:
                  self.line = self.line[m.end():]
                  handler = getattr(self, 'convert_%s' % key)
                  token = handler(m)
                  break
          else:
              raise TomlDecodeError(self.parser.lineno,
                                    'Parsing error: %r' % self.line)
          if is_end and not BLANK_RE.match(self.line):
              raise TomlDecodeError(self.parser.lineno,
                                    'Something is remained: %r' % self.line)
          return token
docs: Read the line content and return the converted value
  
          :param line: the line to feed to converter
          :param is_end: if set to True, will raise an error if
          the line has something remaining.