![]() ![]() This is where the defaultdict() method is your best friend. So, if you have a list of tuples you can’t just take one value and add it to an existing key. Tuples are immutable, meaning elements can’t be added, removed or reordered. The fifth method we can use for adding multiple values to a key is the defaultdict() method.Īt some point in your career, you will come across a list of tuples. Method 5: Adding Multiple Values to a Dictionary using defaultdict() If we use the append() method here, instead of the extend() method, the new values will also be added to a new list inside of the existing value list. If we’re sure our key doesn’t exist, we need to add an empty list as our second parameter. If we’re sure that our key exists, we can omit the second parameter. If we’re not sure if the key exists and if we want to add multiple values, we add an empty list as the second parameter. The method takes two parameters, of which the second can be omitted if the key already exists in the dictionary. ![]() Using the setdefault() method in combination with extend() adds the new values to the value-list of the specified key. ![]() my_list = ĭictionaries are inside curly braces Each of these values is indexed by its zero-based position, meaning the first value is 0, the second is 1, and so on. The values are comma-separated and indexed by position. Let’s quickly recap and compare the properties of lists and dictionaries: Lists Using lists as containers for multiple values is the easiest way to assign multiple values to any key. Lists as Values – Assigning Multiple Values to a Key ![]()
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