Question

How to create ChainMap for multiple dictionaries in Python

Answer 1

import collections     

d1 = {'a': 'AA', 'c': 'CC', 'd': 'EE'}
d2 = {'b': 'BB', 'c': 'DD', 'f': 'GG'}     

cm = collections.ChainMap(d1, d2)     

print('a = {}'.format(cm['a']))     
print('b = {}'.format(cm['b']))     
print('c = {}'.format(cm['c']))    
print('d = {}'.format(cm['d']))  
print('f = {}'.format(cm['f']))  
 
 
      
'''
run:
  
a = AA
b = BB
c = CC
d = EE
f = GG
 
'''

 

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Answer 2

import collections     

d1 = {'a': 'AA', 'c': 'CC', 'd': 'EE'}
d2 = {'b': 'BB', 'c': 'DD', 'f': 'GG'}     

cm = collections.ChainMap(d1, d2)     

print('Keys = {}'.format(list(cm.keys())))     
print('Values = {}'.format(list(cm.values())))
 
 
      
'''
run:
  
Keys = ['d', 'a', 'f', 'c', 'b']
Values = ['EE', 'AA', 'GG', 'CC', 'BB']
 
'''

 

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Answer 3

import collections     

d1 = {'a': 'AA', 'c': 'CC', 'd': 'EE'}
d2 = {'b': 'BB', 'c': 'DD', 'f': 'GG'}     

cm = collections.ChainMap(d1, d2)     

for key, value in cm.items():         
    print('{} = {}'.format(key, value))
    
      
'''
run:
  
f = GG
b = BB
a = AA
d = EE
c = CC
 
'''

 

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