Sometimes, while working with Python dictionaries, we can have a problem in which we need to assign list elements as a new key in dictionary. This task can occur in web development domain. Lets discuss certain ways in which this task can be performed.
Method #1 : Using zip() + loop
The combination of above functions can be used to solve this problem. In this, we combine list elements with dictionary using zip() and loop is used to combine iteration logic.
# Python3 code to demonstrate working of # Assign list items to Dictionary # Using zip() + loop # initializing list test_list = [{'Gfg' : 1, 'id' : 2 }, {'Gfg' : 4, 'id' : 4 }] # printing original list print("The original list is : " + str(test_list)) # initializing key new_key = 'best' # initializing list add_list = [12, 2] # Assign list items to Dictionary # Using zip() + loop res = [] for sub, val in zip(test_list, add_list): sub[new_key] = val res.append(sub) # printing result print("The modified dictionary : " + str(res)) |
The original list is : [{‘Gfg’: 1, ‘id’: 2}, {‘Gfg’: 4, ‘id’: 4}]
The modified dictionary : [{‘best’: 12, ‘Gfg’: 1, ‘id’: 2}, {‘best’: 2, ‘Gfg’: 4, ‘id’: 4}]
Method #2 : Using list comprehension + zip()
The combination of above functions can be used to solve this problem. In this, we perform the iteration of elements using list comprehension and hence a shorthand.
# Python3 code to demonstrate working of # Assign list items to Dictionary # Using list comprehension + zip() # initializing list test_list = [{'Gfg' : 1, 'id' : 2 }, {'Gfg' : 4, 'id' : 4 }] # printing original list print("The original list is : " + str(test_list)) # initializing key new_key = 'best' # initializing list add_list = [12, 2] # Assign list items to Dictionary # Using list comprehension + zip() res = [{**sub, new_key : ele} for sub, ele in zip(test_list, add_list)] # printing result print("The modified dictionary : " + str(res)) |
The original list is : [{‘Gfg’: 1, ‘id’: 2}, {‘Gfg’: 4, ‘id’: 4}]
The modified dictionary : [{‘best’: 12, ‘Gfg’: 1, ‘id’: 2}, {‘best’: 2, ‘Gfg’: 4, ‘id’: 4}]
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