<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _comment(self, element):
 """Extracts the character to use for comments in the input file."""

        for v in _get_xml_version(element):
            self.versions[v].comment = element.text