dict字典遍历方法.md

#dict字典遍历方法

##python dict遍历：

1、 for in

2、 items

3、 iteritems

##举例：

>>> dict={"name":"python","english":33,"math":35}
>>> dict         
{'name': 'python', 'math': 35, 'english': 33}
>>> for i in dict:
...     print "dict[%s]"%i,dict[i]
...

dict[name] python
dict[math] 35
dict[english] 33

>>> for i in dict:
...     print dict[i]
...
python
35
33

>>> for (k,v) in dict.items():
...     print "dict[%s]="%k,v
...
dict[name]= python
dict[math]= 35
dict[english]= 33


>>> for (k,v) in dict.items():
...     print k,v
...
name python
math 35
english 33


>>> for k,v in dict.iteritems():
...     print "dict[%s]="%k,v
...
dict[name]= python
dict[math]= 35
dict[english]= 33