Python实现列表转换成字典数据结构的方法
本文实例讲述了Python实现列表转换成字典数据结构的方法。分享给大家供大家参考，具体如下：
'''
[
{'symbol':101,'sort':1,'name':'aaaa'},
{'symbol':102,'sort':2,'name':'bbbb'},
{'symbol':103,'sort':3,'name':'cccc'},
{'symbol':104,'sort':4,'name':'dddd'},
{'symbol':105,'sort':5,'name':'eeee'},
{'symbol':106,'sort':6,'name':'ffff'},
{'symbol':107,'sort':7,'name':'gggg'},
{'symbol':108,'sort':8,'name':'hhhh'},
{'symbol':109,'sort':9,'name':'iiii'}
]
转换成如下的结构，便于通过ID获取记录值
{
101:{'sort':1,'symbol':101,'name':'aaaa'},
102:{'sort':2,'symbol':102,'name':'bbbb'},
103:{'sort':3,'symbol':103,'name':'cccc'},
104:{'sort':4,'symbol':104,'name':'dddd'},
105:{'sort':5,'symbol':105,'name':'eeee'},
106:{'sort':6,'symbol':106,'name':'ffff'},
107:{'sort':7,'symbol':107,'name':'gggg'},
108:{'sort':8,'symbol':108,'name':'hhhh'},
109:{'sort':9,'symbol':109,'name':'iiii'}
}
'''
students=[
{'symbol':101,'sort':1,'name':'aaaa'},
{'symbol':102,'sort':2,'name':'bbbb'},
{'symbol':103,'sort':3,'name':'cccc'},
{'symbol':104,'sort':4,'name':'dddd'},
{'symbol':105,'sort':5,'name':'eeee'},
{'symbol':106,'sort':6,'name':'ffff'},
{'symbol':107,'sort':7,'name':'gggg'},
{'symbol':108,'sort':8,'name':'hhhh'},
{'symbol':109,'sort':9,'name':'iiii'}
]
symbol_list=map(lambdax:(x.get('symbol'),x),students)
printsymbol_list
print'-----------------------------------------'
printdict(symbol_list)
#value_list=map(lambdax:x,students)
#
##printdict(zip(symbol_list,value_list))
#
#
#student={
#101:{'symbol':101,'sort':1,'name':'aaaa'}
#}
#
#student=[
#{101:{'symbol':101,'sort':1,'name':'aaaa'}}
#]
#
排序用法：
students=[
{'name':'zhangsan','price':20.01,'date':'2015-01-09T01:00:00Z'},
{'name':'lisi','price':10.01,'date':'2013-01-09T01:00:00Z'},
{'name':'wangwu','price':0.01,'date':'2012-01-09T01:00:00Z'}
]
printsorted(students,key=lambdas:s["name"])
printsorted(students,key=lambdas:s["price"],reverse=True)
printsorted(students,key=lambdas:s["date"],reverse=True)
aa=sorted(students,key=lambdas:s["price"],reverse=True)
sorted(aa,key=lambdas:s["date"],reverse=True)
symbol_arr=[<Symbol:Symbolobject>,<Symbol:Symbolobject>,<Symbol:Symbolobject>]
sorted(symbol_arr,key=lambdas:s.amount,reverse=True)
希望本文所述对大家Python程序设计有所帮助。