Python | Convert a list of Tuples into Dictionary
Sometimes you might need to convert a tuple to dict object to make it more readable.
In this article, we will try to learn how to convert a list of tuples into a dictionary. Here we will find two methods of doing this.
Examples:
Input : [("akash", 10), ("gaurav", 12), ("anand", 14),
("suraj", 20), ("akhil", 25), ("ashish", 30)]
Output : {'akash': [10], 'gaurav': [12], 'anand': [14],
'ashish': [30], 'akhil': [25], 'suraj': [20]}
Input : [('A', 1), ('B', 2), ('C', 3)]
Output : {'B': [2], 'A': [1], 'C': [3]}
Input : [("Nakul",93), ("Shivansh",45), ("Samved",65),
("Yash",88), ("Vidit",70), ("Pradeep",52)]
Output : {'Nakul': [93], 'Shivansh': [45], 'Samved': [65],
'Yash': [88], 'Vidit': [70], 'Pradeep': [52]}
Input : [('Sachin', 10), ('MSD', 7), ('Kohli', 18), ('Rohit', 45)]
Output : {'Sachin': 10, 'MSD': 7, 'Kohli': 18, 'Rohit': 45}
Method 1 : Use of setdefault()
Here we have used the dictionary method setdefault() to convert the first parameter to key and the second to the value of the dictionary. setdefault(key, def_value) function searches for a key and displays its value and creates a new key with def_value if the key is not present. Using the append function we just added the values to the dictionary.
Example 1:
# Python code to convert into dictionary def Convert(tup, di): for a, b in tup: di.setdefault(a, []).append(b) return di # Driver Code tups = [("akash", 10), ("gaurav", 12), ("anand", 14), ("suraj", 20), ("akhil", 25), ("ashish", 30)]dictionary = {}print (Convert(tups, dictionary)) |
Output:
{'akash': [10], 'gaurav': [12], 'anand': [14],
'ashish': [30], 'akhil': [25], 'suraj': [20]}
Example 2:
# Python code to convert into dictionarylist_1=[("Nakul",93), ("Shivansh",45), ("Samved",65), ("Yash",88), ("Vidit",70), ("Pradeep",52)]dict_1=dict() for student,score in list_1: dict_1.setdefault(student, []).append(score)print(dict_1) |
Output:
{'Nakul': [93], 'Shivansh': [45], 'Samved': [65], 'Yash': [88], 'Vidit': [70], 'Pradeep': [52]}
Method 2 : Use of dict() method
Example 1:
# Python code to convert into dictionarydef Convert(tup, di): di = dict(tup) return di # Driver Code tups = [("akash", 10), ("gaurav", 12), ("anand", 14), ("suraj", 20), ("akhil", 25), ("ashish", 30)]dictionary = {}print (Convert(tups, dictionary)) |
Output:
{'anand': 14, 'akash': 10, 'akhil': 25,
'suraj': 20, 'ashish': 30, 'gaurav': 12}
Example 2:
# Python code to convert into dictionary print (dict([('Sachin', 10), ('MSD', 7), ('Kohli', 18), ('Rohit', 45)])) |
Output:
{'Sachin': 10, 'MSD': 7, 'Kohli': 18, 'Rohit': 45}
This is a simple method of conversion from a list or tuple to a dictionary. Here we pass a tuple into the dict() method which converts the tuple into the corresponding dictionary.
Last Updated on October 29, 2021 by admin