可迭代对象下标取值超出索引范围,会报错:IndexError
可迭代切片取值超出索引范围,不报错,而是返回对应的空值.
1 a=[1,2,3,4] 2 a[99] 3 Traceback (most recent call last): 4 File "/usr/lib/python3/dist-packages/IPython/core/interactiveshell.py", line 2882, in run_code 5 exec(code_obj, self.user_global_ns, self.user_ns) 6 File "<ipython-input-32-f44cd5f2f9f9>", line 1, in <module> 7 a[99] 8 IndexError: list index out of range 9 10 11 a[99:] 12 Out[33]: []