元组& 字典

元组tuple

#只能初次赋值，不能更改和删除

#支持切片

>>> a
(1, 2, 3, 4, 5, 6, 7, 8, 9)
>>> a [0:6:2]
(1, 3, 5)

type((1,))#tuple

type((1)) # int

元组可做格式化输出

>>> print '这个数%f' % (5)
这个数5.000000
>>> print '整数%d' % (5)
整数5
>>> print '字符%s' % ('abc')
字符abc

字典

 >>> zidian={'April':'student', 'wu':'teacher'}
>>>
>>> for k, v in zidian.items():
...     print 'key:%s value:%s' % (k,v)
...
key:April value:student
key:wu value:teacher 

 

.keys

.values #dic[key]

>>> zidian
{'April': 'student', 'wu': 'teacher'}
>>> zidian['zhang'] = 'teacher'                                 #字典可赋值
>>> zidian
{'April': 'student', 'wu': 'teacher', 'zhang': 'teacher'}
>>> zidian['zhang'] = 'mysql'                                   #字典的值可更改
>>> zidian
{'April': 'student', 'wu': 'teacher', 'zhang': 'mysql'}
>>>
>>> del zidian['zhang']                                           #字典的值可删除
>>> zidian
{'April': 'student', 'wu': 'teacher'}
>>> for i in zidian.keys():
... print i
...
April
wu
>>> for i in zidian.values():
... print i
...
student
teacher