Python - Construct variables of list elements

Python – Construct variables of list elements

Last Updated : 06 Mar, 2020

Sometimes, while working with python lists, we can have a problem in which we need to convert each element in list to variables and corresponding list as value. This can have application in many domains such as web development and day-day programming. Lets discuss certain ways in which this task can be performed.

Method #1 : Using dict() + zip()
The combination of above functions can be used to perform this task. In this, we zip both the list into a dictionary and key of dictionary can act as variable and value as variable value.

# Python3 code to demonstrate  
# Construct variables of list elements 
# using dict() + zip() 
  
# Initializing lists  
test_list1 = ['gfg', '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)) 
  
# Construct variables of list elements 
# using dict() + zip() 
res = dict(zip(test_list1, test_list2)) 
  
# printing result  
print ("Variable value 1 : " + str(res['gfg'])) 
print ("Variable value 2 : " + str(res['best'])) 

Output :

The original list 1 is : ['gfg', 'is', 'best']
The original list 2 is : [1, 2, 3]
Variable value 1 : 1
Variable value 2 : 3

Method #2 : Using global() + loop
This is yet another way to initialize variables as lists. In this we use global space to declare variables.

# Python3 code to demonstrate  
# Construct variables of list elements 
# using globals() + loop 
  
# Initializing lists  
test_list1 = ['gfg', '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)) 
  
# Construct variables of list elements 
# using globals() + loop 
for var, val in zip(test_list1, test_list2): 
    globals()[var] = val 
  
# printing result  
print ("Variable value 1 : " + str(gfg)) 
print ("Variable value 2 : " + str(best)) 

Output :

The original list 1 is : ['gfg', 'is', 'best']
The original list 2 is : [1, 2, 3]
Variable value 1 : 1
Variable value 2 : 3

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