Python字典

字典

字典是由键-值（key-value）对构成的映射数据类型

通过键取值,不支持下标操作

>>> adict = {'host':'earth'}  #create dict
>>> adict['port'] = 80        #add to dict
>>> adict
{'host': 'earth', 'port': 80}
>>> adict.keys()
['host', 'port']
>>> adict['host']
'earth'
>>> for key in adict:
...     print key,adict[key]
... 
host earth
port 80

>>> 'host' in adict
True
>>> 'earth' in adict
False