@property<EOL><INDENT>def is_allval(self):<DEDENT>
tups = self.tuples<EOL>return tups[-<NUM_LIT:1>][<NUM_LIT:1>] == <NUM_LIT:0> and tups[<NUM_LIT:0>][<NUM_LIT:1>] != <NUM_LIT:0><EOL>
Return True if this geoid is an allval -- the last field is zero, but the first is not