python如何给字典的键对应的值为字典项的字典赋值_Python

python如何给字典的键对应的值为字典项的字典赋值

2021-08-01 01:02奋斗_小伙 Python

这篇文章主要介绍了python如何给字典的键对应的值为字典项的字典赋值，文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值，需要的朋友们下面随着小编来一起学习学习吧

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)