def p_ctx_coords(self, p):
if len(p) == <NUM_LIT:2>:<EOL><INDENT>p[<NUM_LIT:0>] = [p[<NUM_LIT:1>]]<EOL><DEDENT>else:<EOL><INDENT>p[<NUM_LIT:0>] = p[<NUM_LIT:1>] + [p[<NUM_LIT:3>]]<EOL><DEDENT>
ctx_coords : multiplicative_path
                        | ctx_coords COLON multiplicative_path