Variable
未定义的 variable
>>> len(abc)
Traceback (most recent call last):
File "<console>", line 1, in <module>
NameError: name 'abc' is not defined
Dict
不存在的 Key
>>> a = {}
>>> a["s"]
Traceback (most recent call last):
File "<console>", line 1, in <module>
KeyError: 's'
Function
未定义的函数
>>> fun()
Traceback (most recent call last):
File "<console>", line 1, in <module>
NameError: name 'fun' is not defined
>>> a = None
>>> a()
Traceback (most recent call last):
File "<console>", line 1, in <module>
TypeError: 'NoneType' object is not callable
...