immutabledict_quickstart_creation_access_and_immutability.py

1from immutabledict import immutabledict
2
3# Create an immutable dictionary
4data = immutabledict({"a": 1, "b": 2})
5
6# Accessing values works like a normal dict
7print(data["a"])  # Output: 1
8print(len(data))  # Output: 2
9
10# Since it's immutable, it's hashable and can be used as a dict key or set element
11my_set = {data}
12
13# Any attempt to modify it will raise a TypeError
14try:
15    data["c"] = 3
16except TypeError as e:
17    print(f"Error: {e}")
18
19# To "modify" it, you create a new instance (e.g., using the .set() method)
20new_data = data.set("c", 3)
21print(new_data)  # Output: immutabledict({'a': 1, 'b': 2, 'c': 3})