Python程序在字典列表中显示具有相同值的键

给定一个包含所有字典元素的列表，任务是编写一个Python程序来提取所有字典中具有相似值的键。

例子：

Input : test_list = [{“Gfg”: 5, “is” : 8, “best” : 0}, {“Gfg”: 5, “is” : 1, “best” : 0}, {“Gfg”: 5, “is” : 0, “best” : 0}] 
Output : [‘Gfg’, ‘best’] 
Explanation : All Gfg values are 5 and best has 0 as all its values in all dictionaries.

Input : test_list = [{“Gfg”: 5, “is” : 8, “best” : 1}, {“Gfg”: 5, “is” : 1, “best” : 0}, {“Gfg”: 5, “is” : 0, “best” : 0}] 
Output : [‘Gfg’] 
Explanation : All Gfg values are 5. 
 

方法 1：使用keys()和循环

在这里，我们使用循环遍历列表中的所有元素，并使用 keys() 提取键。对于每个键，比较每个字典的键，如果发现相似，则将键添加到结果中。

Python3

# initializing Matrix
test_list = [{"Gfg": 5, "is": 8, "best": 0},
             {"Gfg": 5, "is": 1, "best": 0},
             {"Gfg": 5, "is": 0, "best": 0}]
  
# printing original list
print("The original list is : " + str(test_list))
  
# getting keys
keys = list(test_list[0].keys())
  
res = []
# iterating each dictionary for similar key's value
for key in keys:
    flag = 1
    for ele in test_list:
  
        # checking for similar values
        if test_list[0][key] != ele[key]:
            flag = 0
            break
  
    if flag:
        res.append(key)
  
# printing result
print("Similar values keys : " + str(res))

输出：

The original list is : [{‘Gfg’: 5, ‘is’: 8, ‘best’: 0}, {‘Gfg’: 5, ‘is’: 1, ‘best’: 0}, {‘Gfg’: 5, ‘is’: 0, ‘best’: 0}]

Similar values keys : [‘Gfg’, ‘best’]

方法 2：使用all() 、 loop和keys()

在这种情况下，内部循环被避免并替换为 all() ，它检查所有具有相似值的键，然后提取键。

蟒蛇3

# initializing Matrix
test_list = [{"Gfg": 5, "is": 8, "best": 0},
             {"Gfg": 5, "is": 1, "best": 0},
             {"Gfg": 5, "is": 0, "best": 0}]
  
# printing original list
print("The original list is : " + str(test_list))
  
# getting keys
keys = list(test_list[0].keys())
  
res = []
  
# iterating each dictionary for similar key's value
for key in keys:
  
    # using all to check all keys with similar values
    flag = all(test_list[0][key] == ele[key] for ele in test_list)
  
    if flag:
        res.append(key)
  
# printing result
print("Similar values keys : " + str(res))

输出：

The original list is : [{‘Gfg’: 5, ‘is’: 8, ‘best’: 0}, {‘Gfg’: 5, ‘is’: 1, ‘best’: 0}, {‘Gfg’: 5, ‘is’: 0, ‘best’: 0}]

Similar values keys : [‘Gfg’, ‘best’]