Python | Difference in keys of two dictionaries

Last Updated : 12 Feb, 2019

Given two dictionaries dic1 and dic2 which may contain same-keys, find the difference of keys in given dictionaries.

Code #1 : Using set to find keys that are missing.

# Python code to find the difference in 
# keys in two dictionary 
  
# Initialising dictionary  
dict1= {'key1':'Geeks', 'key2':'For', 'key3':'geeks'} 
dict2= {'key1':'Geeks', 'key2:':'Portal'} 
  
diff = set(dict2) - set(dict1) 
  
# Printing difference in 
# keys in two dictionary 
print(diff) 

Output:

{'key2:'}

Code #2 : Finding keys in dict2 which are not in dict1.

# Python code to find difference in keys in two dictionary 
  
# Initialising dictionary  
dict1= {'key1':'Geeks', 'key2':'For'} 
dict2= {'key1':'Geeks', 'key2':'For', 'key3':'geeks', 
        'key4': {'GeekKey1': 12, 'GeekKey2': 22, 'GeekKey3': 32 }} 
  
for key in dict2.keys(): 
    if not key in dict1: 
  
        # Printing difference in 
        # keys in two dictionary 
        print(key) 

Output:

key4
key3

Code #3: Finding keys in dict1 which are not in dict2.

# Python code to find difference in keys in two dictionary 
  
# Initialising dictionary  
dict1= {'key1':'Geeks', 'key12':'For'} 
dict2= {'key1':'Geeks', 'key2':'For', 'key3':'geeks', 
        'key4': {'GeekKey1': 12, 'GeekKey2': 22, 'GeekKey3': 32 }} 
          
for key in dict1.keys(): 
    if not key in dict2: 
  
        # Printing difference in 
        # keys in two dictionary 
        print(key) 

Output:

key12

Code #4 : Finding the same keys in two dictionaries.

# Python code to find difference in keys in two dictionary 
  
# Initialising dictionary  
dict1= {'key1':'Geeks', 'key2':'For'} 
dict2= {'key1':'Geeks', 'key2':'For', 'key3':'geeks', 
        'key4': {'GeekKey1': 12, 'GeekKey2': 22, 'GeekKey3': 32 }} 
          
print(set(dict1.keys()).intersection(dict2.keys())) 

Output:

{'key2', 'key1'}

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