Question

How to create a set that cannot be changed in Python

Answer 1

st = frozenset(["Python", "PHP", "Java"])

print(st)

st.add("C++")  # AttributeError: 'frozenset' object has no attribute 'add'

print(st)


'''
run:
 
frozenset({'Java', 'PHP', 'Python'})

'''

 

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Answer 2

lst = ["Python", "PHP", "Java"]
fst = frozenset(lst)

print(fst)

fst[0] = "C++"   # 'frozenset' object does not support item assignment


'''
run:

frozenset({'Python', 'PHP', 'Java'})

'''

 

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