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Python | Equate two list index elements

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  • Last Updated : 20 Mar, 2019

Sometimes we need to link two list from the point of view of their index elements and this kind of problem comes mostly in places where we need to display in formatted form the linkage of two lists with one another. This a very specific problem, but can be useful whenever we need a possible solution. Let’s discuss certain ways in which this can be done.

Method #1 : Using formatting + tuple()
The string formatting can be used to specify the way we need to output the list and the task of pairing the like indices can be done with the help of tuple function.




# Python3 code to demonstrate
# Equate two list index elements
# using formatting + tuple()
  
# initializing lists 
test_list1 = ['GeeksforGeeks', 'is', 'best']
test_list2 = ['1', '2', '3']
  
# printing original lists 
print("The original list 1 is : " + str(test_list1))
print("The original list 2 is : " + str(test_list2))
  
# using formatting + tuple() to
# Equate two list index elements
temp = len(test_list1) * '% s = %% s, '
res = temp % tuple(test_list1) % tuple(test_list2)
  
# printing result
print ("The paired elements string is : " + res)


Output :

The original list 1 is : ['GeeksforGeeks', 'is', 'best']
The original list 2 is : ['1', '2', '3']
The paired elements string is : GeeksforGeeks = 1, is = 2, best = 3, 

 

Method #2 : Using join() + zip()
These two methods can also combine to achieve this particular task, the join function can be used to extend the format logic to all indices and construct a string, zip function pairs the like index elements from both the tuples.




# Python3 code to demonstrate
# Equate two list index elements
# using join() + zip()
  
# initializing lists 
test_list1 = ['GeeksforGeeks', 'is', 'best']
test_list2 = ['1', '2', '3']
  
# printing original lists 
print("The original list 1 is : " + str(test_list1))
print("The original list 2 is : " + str(test_list2))
  
# using join() + zip() to
# Equate two list index elements
res = ', '.join('% s = % s' % i for i in zip(test_list1, test_list2))
  
# printing result
print ("The paired elements string is : " + res)


Output :

The original list 1 is : ['GeeksforGeeks', 'is', 'best']
The original list 2 is : ['1', '2', '3']
The paired elements string is : GeeksforGeeks = 1, is = 2, best = 3, 


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