我一般对python和开发都是陌生的,所以我可以肯定我的问题措辞有点错误。英语也不是我的母语,因此,如果您正在寻找有关我想做的事情的更多信息,我将很乐意为您解释。
基本上,我有一个字典列表,它们都共享相同的键但值不同。 例如:
List1 = [{
'name':'yuval',
'age':16,
'favorite_thing_to_do': 'playing the cello' },
{
'name':'yuval',
'age':16,
'favorite_thing_to_do':'hearing music'},
'name':'shiri',
'age':12,
'favorite_thing_to_do':'watch TV'}]
我正在寻找的输出是一个列表,其中favorite_thing_to_do
会在任何可能的位置合并。
例如,出局将是
[{'name':'yuval',
'age':16,
'favorite_thing_to_do': ['playing the cello' , 'hearing music']},
{'name':'shiri',
'age':12,
'favorite_thing_to_do':'watch TV'}]
但是,我不知道该怎么做。
我设法定义了一个名为merge_dict
的函数,该函数基本上需要两个字典,比较前两个键(名称和年龄),如果值相同,则返回一个字典,其中favorite_thing_to_do
是一个列表函数接收的两个不同字典中的不同值。
从概念上讲,该功能非常有用;但是,我不知道如何在包含100多个未过滤字典的列表上运行此功能; 有更简单的方法吗?
编辑: 我将包括到目前为止已经完成的相关代码。 我不知道如何在列表中做我想做的事,所以我只声明了两个字典:我的函数merge_dict集中的Item3,Item4:
Item3 = {
'name':'shiri',
'age':12,
'favorite_thing_to_do':'watch TV'}
Item4 = {
'name':'shiri',
'age':12,
'favorite_thing_to_do': 'listening to teachers'
}
def merge_dict(dict1, dict2):
# we know that dict1 and dict2 are the same length, same keys.
dict3 = {}
for i in dict1:
if dict1[i] == dict2[i]:
dict3[i] = dict1[i]
if i == 'favorite_thing_to_do':
if isinstance(dict1[i], str) and isinstance(dict2[i],str) :
dict3[i] = [dict1[i] , dict2[i]]
if isinstance(dict1[i], list) and isinstance(dict2[i],str):
dict3[i] = dict1[i] + [dict2[i]]
if isinstance(dict1[i], str) and isinstance(dict2[i],list):
dict3[i] = [dict1[i]] + dict1[i]
if isinstance(dict1[i], list) and isinstance(dict2[i],list):
dict3[i] = dict1[i] + dict1[i]
return dict3
print(merge_dict(Item3, Item4))
>>> {'name': 'shiri', 'age': 12, 'favorite_thing_to_do': ['watch TV',
'listening to teachers']}
答案 0 :(得分:0)
我看到我错过了姓名和年龄部分。这是一种变体,其中我使用名称和年龄的元组作为键,并使用字典作为值。
经过编辑以以要求的格式显示结果(尽管最好返回名称):
def merge(dirs):
names = {}
for d in dirs:
if (d['name'], d['age']) not in names:
names[(d['name'], d['age'])] = {}
for k in d:
if k not in ('name', 'age'):
if k not in names[(d['name'], d['age'])]:
names[(d['name'], d['age'])][k] = set([])
names[(d['name'], d['age'])][k].add(d[k])
# return names
return [{'name':k[0], 'age':k[1], 'favorite_things_to_do':
list(v2) } for k, v in names.items() for v2 in v.values() ]
print(merge(List1))
答案 1 :(得分:0)
您可以执行以下操作:
List1 = [{
'name':'yuval',
'age':16,
'favorite_thing_to_do': 'playing the cello' },
{
'name':'yuval',
'age':16,
'favorite_thing_to_do':'hearing music'},
{'name':'shiri',
'age':12,
'favorite_thing_to_do':'watch TV'}]
def merge_dict(dictionary,merged_dict):
name = dictionary.get('name')
age = dictionary.get('age')
favorite = dictionary.get('favorite_thing_to_do')
#var to inform if needed to write a new dict:
found_item = False
# if merged_dict list is empty create the first dict:
if len(merged_dict)==0:
merged_dict.append({'name':name, 'age':age,'favorite_thing_to_do':[favorite] })
# if merged_dict list is not empty,
else:
#look for name and age in all dicts of merged_dict:
for registred_dict in merged_dict:
#If found => Append favorite_thing_to_do
if registred_dict.get('name') == name and registred_dict.get('age')==age:
registred_dict['favorite_thing_to_do'].append(favorite)
found_item=True
#If not found create a new dict in merged_dict:
if not found_item:
merged_dict.append({'name':name, 'age':age,'favorite_thing_to_do':[favorite] })
merged_dict = []
for dictionary in List1:
merge_dict(dictionary,merged_dict)
print(merged_dict)
Item4 = {
'name':'shiri',
'age':12,
'favorite_thing_to_do': 'listening to teachers'
}
merge_dict(Item4,merged_dict)
print(merged_dict)
首先打印结果:
[{'name': 'yuval', 'age': 16, 'favorite_thing_to_do': ['playing the cello', 'hearing music']}, {'name': 'shiri', 'age': 12, 'favorite_thing_to_do': ['watch TV']}]
合并Item4后的结果:
[{'name': 'yuval', 'age': 16, 'favorite_thing_to_do': ['playing the cello', 'hearing music']}, {'name': 'shiri', 'age': 12, 'favorite_thing_to_do': ['watch TV', 'listening to teachers']}]