元组定义

>>> x=1,2,3
>>> x
(1, 2, 3)
>>> type(x)
<class 'tuple'>
>>> del x
>>> x
Traceback (most recent call last):
File "<pyshell#4>", line 1, in <module>
x
NameError: name 'x' is not defined
>>> x = (1,2,3)
>>> x
(1, 2, 3)
>>> type(x)
<class 'tuple'>
>>> del x
>>> x = ()
>>> x
()
>>> type(x)
<class 'tuple'>
>>> x = (42,)
>>> x
(42,)
>>> type(x)
<class 'tuple'>