#字典的创建删除一些操作

>>> dir1=dir(((1,100),(2,200)))
>>> dir1
[‘__add__‘, ‘__class__‘, ‘__contains__‘, ‘__delattr__‘, ‘__doc__‘, ‘__eq__‘, ‘__format__‘, ‘__ge__‘, ‘__getattribute__‘, ‘__getitem__‘, ‘__getnewargs__‘, ‘__getslice__‘, ‘__gt__‘, ‘__hash__‘, ‘__init__‘, ‘__iter__‘, ‘__le__‘, ‘__len__‘, ‘__lt__‘, ‘__mul__‘, ‘__ne__‘, ‘__new__‘, ‘__reduce__‘, ‘__reduce_ex__‘, ‘__repr__‘, ‘__rmul__‘, ‘__setattr__‘, ‘__sizeof__‘, ‘__str__‘, ‘__subclasshook__‘, ‘count‘, ‘index‘]
>>> dir1=dict(((1,100),(2,200)))#注意此处两个外面的小括号
>>> dir1
{1: 100, 2: 200}
>>> dir2=(黎明=‘李宁‘,大家=‘你好‘)
SyntaxError: invalid syntax
>>> dir2=dict(黎明=‘李宁‘,大家=‘你好‘)
SyntaxError: invalid syntax
>>> dir2=dict(黎明=‘李宁‘,大家=‘你好‘)
SyntaxError: invalid syntax
>>> dir2=dict(黎明=‘李宁‘, 大家=‘你好‘)
SyntaxError: invalid syntax
>>> 
>>> 
>>> dir2=dict(    nihao=‘wozhidao‘, buha=‘buzhida‘)
>>> dir2
{‘nihao‘: ‘wozhidao‘, ‘buha‘: ‘buzhida‘}
>>> dir2=dict(    nihao=‘天天‘, buha=‘大世界‘)
>>> 地热
SyntaxError: invalid syntax
>>> 
>>> dir2
{‘nihao‘: ‘\xcc\xec\xcc\xec‘, ‘buha‘: ‘\xb4\xf3\xca\xc0\xbd\xe7‘}
>>> dir2=dict(    nihao=‘wozhidao‘, 大家=‘buzhida‘)
SyntaxError: invalid syntax
>>> dir3[‘12‘]=21

Traceback (most recent call last):
  File "<pyshell#37>", line 1, in <module>
    dir3[‘12‘]=21
NameError: name ‘dir3‘ is not defined
>>> dir2
{‘nihao‘: ‘\xcc\xec\xcc\xec‘, ‘buha‘: ‘\xb4\xf3\xca\xc0\xbd\xe7‘}
>>> dir1
{1: 100, 2: 200}
>>> dir1[1]=2000
>>> dir1
{1: 2000, 2: 200}
>>> dir1[3]=3000
>>> dir1
{1: 2000, 2: 200, 3: 3000}
>>> 
>>> 
>>> 
>>> 

>>> 



>>> 

>>> 

>>> 


>>> 

>>> dir11={}
>>> 
>>> dir11
{}
>>> dir11.fromkeys((1,2,3))
{1: None, 2: None, 3: None}
>>> dir11.fromkeys((1,2,3),(‘number‘))
{1: ‘number‘, 2: ‘number‘, 3: ‘number‘}
>>> dir11.fromkeys((1,2,3),(‘one‘,‘two‘,‘three‘))
{1: (‘one‘, ‘two‘, ‘three‘), 2: (‘one‘, ‘two‘, ‘three‘), 3: (‘one‘, ‘two‘, ‘three‘)}
>>> dir11.fromkeys((1,3),‘nukmber‘)
{1: ‘nukmber‘, 3: ‘nukmber‘}
>>> 
>>> 
>>> #eg2
>>> di={(1,11),(2,22),3(33)}

Traceback (most recent call last):
  File "<pyshell#63>", line 1, in <module>
    di={(1,11),(2,22),3(33)}
TypeError: ‘int‘ object is not callable
>>> di=dirt{(1,11),(2,22),3(33)}
SyntaxError: invalid syntax
>>> di=dict{(1,11),(2,22),3(33)}
SyntaxError: invalid syntax
>>> di=dict{(1,11),(2,22),(3,33)}
SyntaxError: invalid syntax
>>> di=dirt{1:11,2:22,3:33}
SyntaxError: invalid syntax
>>> di=dict{1:11,2:22,3:33}
SyntaxError: invalid syntax
>>> 
>>> di=dict(((1,11),(2,22),3(33)))

Traceback (most recent call last):
  File "<pyshell#70>", line 1, in <module>
    di=dict(((1,11),(2,22),3(33)))
TypeError: ‘int‘ object is not callable
>>> di=dict(((1,11),(2,22),(3,33)))
>>> di
{1: 11, 2: 22, 3: 33}
>>> di.iterkeys
<built-in method iterkeys of dict object at 0x0000000002E498C8>
>>> list(di.iterkeys)

Traceback (most recent call last):
  File "<pyshell#74>", line 1, in <module>
    list(di.iterkeys)
TypeError: ‘builtin_function_or_method‘ object is not iterable
>>> for eachKey in di.iterkeys:
    print eachKey

    

Traceback (most recent call last):
  File "<pyshell#77>", line 1, in <module>
    for eachKey in di.iterkeys:
TypeError: ‘builtin_function_or_method‘ object is not iterable
>>> for eachKey in di.iterkeys():#三种变量方式   1遍历值 2遍历建  3遍历键值对
    print(eachKey)

    
1
2
3
>>> for eachKey in di.iterkeys:

    print eachKey

    

Traceback (most recent call last):
  File "<pyshell#84>", line 1, in <module>
    for eachKey in di.iterkeys:
TypeError: ‘builtin_function_or_method‘ object is not iterable
>>> for eachKey in di.itervalues():
    print(eachKey)

    
11
22
33
>>> for eachitem in di.iteritems
SyntaxError: invalid syntax
>>> for eachitem in di.iteritems():
    print (eachitem)