<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def parse_skip_comment(self):
 """Parse a definition comment for noqa skips."""

        skipped_error_codes = ''
        if self.current.kind == tk.COMMENT:
            if 'noqa: ' in self.current.value:
                skipped_error_codes = ''.join(
                     self.current.value.split('noqa: ')[1:])
            elif self.current.value.startswith('# noqa'):
                skipped_error_codes = 'all'
        return skipped_error_codes