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Python Immutable datatypes(int, float, str, tuple and frozensets)

From WikiOD

Individual characters of strings are not assignable[edit | edit source]

foo = "bar"
foo[0] = "c" # Error

Immutable variable value can not be changed once they are created.

Tuple's individual members aren't assignable[edit | edit source]

foo = ("bar", 1, "Hello!",)
foo[1] = 2 # ERROR!!

Second line would return an error since tuple members once created aren't assignable. Because of tuple's immutability.

Frozenset's are immutable and not assignable[edit | edit source]

foo = frozenset(["bar", 1, "Hello!"])
foo[2] = 7 # ERROR
foo.add(3) # ERROR

Second line would return an error since frozenset members once created aren't assignable. Third line would return error as frozensets do not support functions that can manipulate members.

Credit:Stack_Overflow_Documentation