Web Reference: Jul 23, 2025 · In Python, dictionaries are used to store key-value pairs. However, dictionaries do not support duplicate keys. In this article, we will explore several techniques to store multiple values for a single dictionary key. In Python, dictionary keys must be unique. The reversedictionary approach treats the key as a value and the value as a key. A reverse dictionary is created; if the value exists in the reverse dictionary, it is a duplicate. For example, run the code below to find the duplicate subjects for the students in the dictionary. From the output, you can see that for ‘Math’ subjects, there are two st... Sep 27, 2025 · They are resolved by finding an alternative position in the hash table (using probing) and performing equality checks to ensure the correct key is accessed. Understanding this distinction can...
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