比较和更新字典中的列表值

Question

dict1 = {
    "domain1": ["53/tcp,open,domain", "80/tcp,open,http"],
    "domain2": ["22/tcp,open,ssh", "25/tcp,open,smtp", "80/tcp,open,http",
                "443/tcp,open,https"],
    "domain3":["22/tcp,open,ssh"]}

I want to compare dict2 with dict1 and check if there are new keys or values (which is list of open ports),If yes then update the dict1

dict2 = {
    "domain3":["22/tcp,open,ssh","443/tcp,open,https"],
    "domain4":["80/tcp,open,http", "443/tcp,open,https"],
    "domain5":["80/tcp,open,http", "443/tcp,open,https"]}

I did first part of the task ie to find any new keys by comparing dict2 with dict1 keys & checking if there are any new keys in dict2 & updating dict1 .

new_item = {}
for i in dict2.keys():
    if i not in dict1.keys():
        new_item[i] = dict2[i]
        dict1[i] = dict2[i]
print("NEW DOMAINS FOUND : ",new_item)
print(dict1) ## UPDATED with New Domains Found

Here's the output:

NEW DOMAINS FOUND :  {
  'domain4': ['80/tcp,open,http', '443/tcp,open,https'],
  'domain5': ['80/tcp,open,http', '443/tcp,open,https']}
 {'domain1': ['53/tcp,open,domain', '80/tcp,open,http'],
  'domain2': ['22/tcp,open,ssh', '25/tcp,open,smtp', '80/tcp,open,http',
              '443/tcp,open,https'],
  'domain3': ['22/tcp,open,ssh'],
  'domain4': ['80/tcp,open,http', '443/tcp,open,https'],
  'domain5': ['80/tcp,open,http', '443/tcp,open,https']}

I need help solving second part of the task which is compare the values of dict2 with dict1, and if there are any new values in dict2 then update the dict1 with those values.

If you look at dict2[domain3] and dict1[domain3] , there is an new value in dict2[domain3] , with this, now dict1[domain3] should get updated with those new value.

Output which I want on comparing dict2 with dict1 & updating values/keys:

dict1

{'domain1': ['53/tcp,open,domain', '80/tcp,open,http'],
 'domain2': ['22/tcp,open,ssh', '25/tcp,open,smtp', '80/tcp,open,http',
             '443/tcp,open,https'],
 'domain3': ["22/tcp,open,ssh", "443/tcp,open,https"],
 'domain4': ['80/tcp,open,http', '443/tcp,open,https'],
 'domain5': ['80/tcp,open,http', '443/tcp,open,https']}

If you need more information or have doubts, please leave the comment, and I will update the question.

Answer 1

If the ordering of the elements inside the lists is not important, you can use the following:

dict3 = {}
for k, v in dict2.items():
    dict3[k] = list(set(dict1.get(k, []) + v))

Resulting dict3 :

{'domain3': ['443/tcp,open,https', '22/tcp,open,ssh'], 
 'domain5': ['80/tcp,open,http', '443/tcp,open,https'], 
 'domain4': ['80/tcp,open,http', '443/tcp,open,https']}