@sportsref.decorators.memoize<EOL><INDENT>def week(self):<DEDENT>
doc = self.get_doc()<EOL>raw = doc('<STR_LIT>').attr['<STR_LIT>']<EOL>match = re.match(<EOL>r'<STR_LIT>'.format(self.season()), raw<EOL>)<EOL>if match:<EOL><INDENT>return int(match.group(<NUM_LIT:1>))<EOL><DEDENT>else:<EOL><INDENT>return <NUM_LIT><EOL><DEDENT>
Returns the week in which this game took place. 18 is WC round, 19
        is Div round, 20 is CC round, 21 is SB.
        :returns: Integer from 1 to 21.