(self, where, token)
Inserts *token* before *where*.
Inserts *token* before *where*.
Inserts * token * before * where * .
def insert_before(self, where, token):
        """Inserts *token* before *where*."""
        self.tokens.insert(self.token_index(where), token)
def insert_before ( self , where , token ) : self . tokens . insert ( self . token_index ( where ) , token )