Is searching for an element in a Python dictionary always an operation with constant complexity?

Searching for an element in a Python dictionary (dict) usually has an amortized time complexity of O(1), meaning constant time. This is achieved through the use of a hash table.

However, in rare cases, such as when there are many collisions or the hash function poorly distributes keys, the complexity can degrade to O(n), where n is the number of elements in the dictionary.

Therefore, search is not always strictly O(1), but in practice and in most cases, it is indeed so.