你可以使用numpy库(适用于Python2。x只):

   import numpy as np 

   list_of_unique_dicts=list(np.unique(np.array(list_of_dicts)))

让它在Python 3中工作。X(以及numpy的最新版本)，您需要将字典数组转换为numpy字符串数组，例如。

list_of_unique_dicts=list(np.unique(np.array(list_of_dicts).astype(str)))

我总结了我最喜欢的尝试:

https://repl.it/@SmaMa/Python-List-of-unique-dictionaries

# ----------------------------------------------
# Setup
# ----------------------------------------------

myList = [
  {"id":"1", "lala": "value_1"},
  {"id": "2", "lala": "value_2"}, 
  {"id": "2", "lala": "value_2"}, 
  {"id": "3", "lala": "value_3"}
]
print("myList:", myList)

# -----------------------------------------------
# Option 1 if objects has an unique identifier
# -----------------------------------------------

myUniqueList = list({myObject['id']:myObject for myObject in myList}.values())
print("myUniqueList:", myUniqueList)

# -----------------------------------------------
# Option 2 if uniquely identified by whole object
# -----------------------------------------------

myUniqueSet = [dict(s) for s in set(frozenset(myObject.items()) for myObject in myList)]
print("myUniqueSet:", myUniqueSet)

# -----------------------------------------------
# Option 3 for hashable objects (not dicts)
# -----------------------------------------------

myHashableObjects = list(set(["1", "2", "2", "3"]))
print("myHashAbleList:", myHashableObjects)

这是我找到的解决方案:

usedID = []

x = [
{'id':1,'name':'john', 'age':34},
{'id':1,'name':'john', 'age':34},
{'id':2,'name':'hanna', 'age':30},
]

for each in x:
    if each['id'] in usedID:
        x.remove(each)
    else:
        usedID.append(each['id'])

print x

基本上你检查ID是否存在于列表中，如果存在，删除字典，如果不存在，将ID追加到列表中

可能有更优雅的解决方案，但我认为最好添加一个更详细的解决方案，使其更容易遵循。这里假设没有唯一键，你有一个简单的k,v结构，并且你使用的python版本保证了列表顺序。这适用于原来的职位。

data_set = [
    {'id': 1, 'name': 'john', 'age': 34},
    {'id': 1, 'name': 'john', 'age': 34},
    {'id': 2, 'name': 'hanna', 'age': 30},
]

# list of keys
keys = [k for k in data_set[0]]

# Create a List of Lists of the values from the data Set
data_set_list = [[v for v in v.values()] for v in data_set]

# Dedupe
new_data_set = []
for lst in data_set_list:
    # Check if list exists in new data set
    if lst in new_data_set:
        print(lst)
        continue
    # Add list to new data set
    new_data_set.append(lst)

# Create dicts
new_data_set = [dict(zip(keys,lst)) for lst in new_data_set]    

print(new_data_set)

a = [
{'id':1,'name':'john', 'age':34},
{'id':1,'name':'john', 'age':34},
{'id':2,'name':'hanna', 'age':30},
]

b = {x['id']:x for x in a}.values()

print(b)

输出:

[{“年龄”:34岁“id”:1、“名称”:“约翰”},{“id”:“年龄”:30日2时,“名字”:“汉娜”}]

我不知道你是否只希望列表中dicts的id是唯一的，但如果目标是有一组dict，其中所有键的值都是唯一的。你应该像这样使用元组键:

>>> L=[
...     {'id':1,'name':'john', 'age':34},
...    {'id':1,'name':'john', 'age':34}, 
...    {'id':2,'name':'hanna', 'age':30},
...    {'id':2,'name':'hanna', 'age':50}
...    ]
>>> len(L)
4
>>> L=list({(v['id'], v['age'], v['name']):v for v in L}.values())
>>>L
[{'id': 1, 'name': 'john', 'age': 34}, {'id': 2, 'name': 'hanna', 'age': 30}, {'id': 2, 'name': 'hanna', 'age': 50}]
>>>len(L)
3

希望它能帮助你或其他有顾虑的人....