##python 斷言python
>>> assert 1 == 2, 'aaaaaaaaa' Traceback (most recent call last): File "<stdin>", line 1, in <module> AssertionError: aaaaaaaaa >>>assert isinstance(1, int), 'aaaaaaaaaaaaaa'
###round() >>> round(2, 2) 2.0 >>> round(2.9999, 2) 3.0 >>> round(2.00, 2) 2.0 >>> round(2.12, 2) 2.12 >>> round(2.12111, 2) 2.12 >>> round(2.1111, 2) 2.11code