Python Native Datatypes -- tuple

Python Native Datatypes -- tuple

Example 3.15 Defining a tuple
>>>  t  =  ( " a " ,  " b " ,  " mpilgrim " ,  " z " ,  " example " )
>>>  t
( ' a ' ,  ' b ' ,  ' mpilgrim ' ,  ' z ' ,  ' example ' )
>>>  t[0]
' a '
>>>  t[− 1 ]
' example '
>>>  t[ 1 : 3 ]
( ' b ' ,  ' mpilgrim ' )

1、tuple没有任何方法
2、tuple和list可以相互转化
4、

Common tuple literals and operations

Operation	Interpretation
( )	An empty tuple
t1 = (0,)	A one-item tuple (not an expression)
t2 = (0, 'Ni', 1.2, 3)	A four-item tuple
t2 = 0, 'Ni', 1.2, 3	Another four-item tuple (same as prior line)
t3 = ('abc', ('def', 'ghi'))	Nested tuples
t1[i]t3[i][j]t1[i:j]len(t1)	Index, slice, length
t1 + t2t2 * 3	Concatenate, repeat
for x in t23 in t2	Iteration, members

tuple这些操作和list非常之象。。

Jafe 2007-08-28 21:11 发表评论