demo_python_ref_frozenset.py:
x
 
mylist = ['apple', 'banana', 'cherry']
x = frozenset(mylist)
x[1] = "strawberry"
print(x)
C:\Users\My Name>python demo_python_ref_frozenset.py
Traceback (most recent call last):
  File "demo_ref_frozenset2.py", line 3, in <module>
    x[1] = "strawberry"
TypeError: 'frozenset' object does not support item assignment