Python Create Dictionary from List with Default Values Last Updated : 14 Jan, 2025 Summarize Comments Improve Suggest changes Share Like Article Like Report Creating a dictionary from a list with default values allows us to map each item in the list to a specific default value. Using dict.fromkeys(), we can quickly create a dictionary where all the keys from the list are assigned a default value, such as None or any other constant.Using dict.fromkeys()This method creates a dictionary where each key from the list is associated with a default value. Python k = ['a', 'b', 'c', 'd'] d = 0 # Create dictionary with default values res = dict.fromkeys(k, d) print(res) Output{'a': 0, 'b': 0, 'c': 0, 'd': 0} ExplanationThe fromkeys() method creates a dictionary using the provided list of keys and assigns each key the default value passed.Using Dictionary ComprehensionDictionary Comprehension gives more control over how the keys are mapped to values. Python keys = ['a', 'b', 'c', 'd'] d = 0 # Create dictionary with default values using comprehension result = {key: d for key in keys} print(result) Output{'a': 0, 'b': 0, 'c': 0, 'd': 0} Explanation: A dictionary comprehension loops through the keys list and assigns each key the default_value.Using a for loopYou can manually iterate through the list and add each element to the dictionary with the default value. Python keys = ['a', 'b', 'c', 'd'] d = 0 # Create dictionary with default values using a for loop res = {} for key in keys: res[key] = d print(res) Output{'a': 0, 'b': 0, 'c': 0, 'd': 0} Explanation: for loop iterates over the keys list and assigns the default value to each key in the dictionary. Comment More infoAdvertise with us Next Article Python - Dictionary with Index as Value M moneeshnagireddy Follow Improve Article Tags : Python Python Programs python-list python-dict Practice Tags : pythonpython-dictpython-list Similar Reads Create Dictionary from the List-Python The task of creating a dictionary from a list in Python involves mapping each element to a uniquely generated key, enabling structured data storage and quick lookups. For example, given a = ["gfg", "is", "best"] and prefix k = "def_key_", the goal is to generate {'def_key_gfg': 'gfg', 'def_key_is': 3 min read Python - Create a Dictionary using List with None Values The task of creating a dictionary from a list of keys in Python involves transforming a list of elements into a dictionary where each element becomes a key. Each key is typically assigned a default value, such as None, which can be updated later. For example, if we have a list like ["A", "B", "C"], 3 min read Python - Initialize dictionary with custom value list In python one usually comes across situations in which one has to use dictionary for storing the lists. But in those cases, one usually checks for first element and then creates a list corresponding to key when it comes. But its always wanted a method to initialize the dict. keys with a custom list. 4 min read Get List of Values From Dictionary - Python We are given a dictionary and our task is to extract all the values from it and store them in a list. For example, if the dictionary is d = {'a': 1, 'b': 2, 'c': 3}, then the output would be [1, 2, 3].Using dict.values()We can use dict.values() along with the list() function to get the list. Here, t 2 min read Python - Dictionary with Index as Value We are having a list we need to find index of each element and store it in form of dictionary. For example, a = ['a', 'b', 'c', 'd'] we need to find index of each elements in list so that output should be {'a': 0, 'b': 1, 'c': 2, 'd': 3}.Using Dictionary ComprehensionWe can use dictionary comprehens 2 min read Initialize Python Dictionary with Keys and Values In this article, we will explore various methods for initializing Python dictionaries with keys and values. Initializing a dictionary is a fundamental operation in Python, and understanding different approaches can enhance your coding efficiency. We will discuss common techniques used to initialize 3 min read Like