How do I hash sets in Python for production systems?

Hashing sets in Python can be crucial for ensuring that data structures are efficient and that they can be used in contexts where immutability or quick lookups are necessary. In production systems, using hashed sets (or frozensets) allows for fast membership testing and can be useful in various scenarios such as caching, unique collection handling, and more.

Here's an example of how to create and utilize hashed sets in Python:

my_set = {1, 2, 3, 4}
hashed_set = frozenset(my_set)

# Checking membership
if 2 in hashed_set:
    print("2 is in the hashed set")

# Attempting to add an item to a hashed set will raise an error
try:
    hashed_set.add(5)
except AttributeError as e:
    print("Cannot add to a hashed set:", e)