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Python | Combining values from dictionary of list
  • Last Updated : 06 Mar, 2019

Given a dictionary of list values, the task is to combine every key-value pair in every combination.

Input :
{“Name” : [“Paras”, “Chunky”],
“Site” : [“Geeksforgeeks”, “Cyware”, “Google”] }

Output:
[{‘Site’: ‘Geeksforgeeks’, ‘Name’: ‘Paras’}, {‘Site’: ‘Cyware’, ‘Name’: ‘Paras’},
{‘Site’: ‘Google’, ‘Name’: ‘Paras’}, {‘Site’: ‘Geeksforgeeks’, ‘Name’: ‘Chunky’},
{‘Site’: ‘Cyware’, ‘Name’: ‘Chunky’}, {‘Site’: ‘Google’, ‘Name’: ‘Chunky’}]

Method #1: Using itertools and sorting




# Python code to combine every key value
# pair in every combinations
  
# List initialization
Input = {
"Bool" : ["True", "False"],
"Data" : ["Int", "Float", "Long Long"],
}
  
# Importing
import itertools as it
  
# Sorting input
sorted_Input = sorted(Input)
  
# Using product after sorting
Output = [dict(zip(sorted_Input, prod)) 
          for prod in it.product(*(Input[sorted_Input]
          for sorted_Input in sorted_Input))]
  
# Printing output
print(Output)
Output:



[{‘Bool’: ‘True’, ‘Data’: ‘Int’}, {‘Bool’: ‘True’, ‘Data’: ‘Float’}, {‘Bool’: ‘True’, ‘Data’: ‘Long Long’}, {‘Bool’: ‘False’, ‘Data’: ‘Int’}, {‘Bool’: ‘False’, ‘Data’: ‘Float’}, {‘Bool’: ‘False’, ‘Data’: ‘Long Long’}]

 
Method #2: Using Zip




# Python code to combine every key value
# pair in every combinations
  
# Importing
import itertools
  
# Input Initialization
Input = {
"Bool" : ["True", "False"],
"Data" : ["Int", "Float", "Long Long"],
}
  
# using zip and product without sorting
Output = [[{key: value} for (key, value) in zip(Input, values)] 
              for values in itertools.product(*Input.values())]
                  
# Printing output
print(Output)
Output:

[[{‘Data’: ‘Int’}, {‘Bool’: ‘True’}], [{‘Data’: ‘Int’}, {‘Bool’: ‘False’}], [{‘Data’: ‘Float’}, {‘Bool’: ‘True’}], [{‘Data’: ‘Float’}, {‘Bool’: ‘False’}], [{‘Data’: ‘Long Long’}, {‘Bool’: ‘True’}], [{‘Data’: ‘Long Long’}, {‘Bool’: ‘False’}]]

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