python dict multiple values for one key

In Python, dictionaries are versatile data structures that allow you to store key-value pairs efficiently. However, by default, a dictionary can only have one value associated with each key. What if you need to store multiple values for a single key? In this tutorial, we'll explore different ways to achieve this using Python.
The simplest way to store multiple values for a key is to use a list as the value associated with that key.
The collections module in Python provides a defaultdict class, which allows you to specify a default value for each key. In this case, we can use a list as the default value.
The setdefault() method of a dictionary can be used to set the default value for a key if it does not exist. We can use this method to ensure a list is associated with each key.
Choose the method that best suits your needs based on the complexity of your program and the operations you intend to perform on the dictionary. Each approach has its advantages, so it's important to understand your requirements before deciding on the most appropriate method for handling multiple values for a single key in Python dictionaries.
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