python如何给字典的键对应的值为字典项的字典赋值
问题 1：需要得到一个类似{“demo”:{“key”:”value”}}这样格式的字典dic。
dic = dict()
dic_temp = dict()
dic_temp = {"key":"value"}
dic["demo"] = dic_temp
问题 2：创建一个多值映射字典.。
d = {}
for key, value in pairs:
if key not in d:
d[key] = []
d[key].append(value)
问题 3：需要得到一个类似[ { “id”:1,“text” : “Root node”, “children” : [ {“id”:2,”text”:”Child node 1”,”children”:true}，”Child node 2”] } ]这样格式的json文本。
import json
import codecs
import sys
reload(sys)
sys.setdefaultencoding('utf8')
def Format_data():
HY_Info = Search_HYInfo()
ChildNodes = Search_ChildNodes()
print '开始格式化数据'
HY_Nodes = []
for HY_id in ChildNodes.keys():
HY_Node = {}
HY_Node['id'] = HY_id
if HY_id in HY_Info.keys():
HY_Node['text'] = HY_Info[HY_id].decode('gbk')+'('+str(HY_id)+')'
else:
HY_Node['text'] = '--'
print HY_Node['text']
HY_Node['children'] =[]
for child_id in ChildNodes[HY_id]:
child_Node = {}
child_Node['id'] = child_id
if child_id in HY_Info.keys():
child_Node['text'] = HY_Info[child_id].decode('gbk') + '('+str(child_id) + ')'
else:
child_Node['text'] = '--'
if child_id in ChildNodes.keys():
child_Node['children'] = True
else:
child_Node['children'] = False
HY_Node['children'].append(child_Node)
HY_Nodes.append(HY_Node)
json_data = json.dumps(HY_Nodes,ensure_ascii=False,encoding="gb2312")
with codecs.open('./data/Parents_leves.json', "wb", "utf-8") as f:
f.write(json_data)
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