Does python have immutable lists?
Suppose I wish to have the functionality of an ordered collection of elements, but which I want to guarantee will not change, how can this be implemented? Lists are ordered but they can be mutated.
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Does python have immutable lists?
Suppose I wish to have the functionality of an ordered collection of elements, but which I want to guarantee will not change, how can this be implemented? Lists are ordered but they can be mutated.
Yes. It’s called a
tuple.So, instead of
[1,2]which is alistand which can be mutated,(1,2)is atupleand cannot.Further Information:
A one-element
tuplecannot be instantiated by writing(1), instead, you need to write(1,). This is because the interpreter has various other uses for parentheses.You can also do away with parentheses altogether:
1,2is the same as(1,2)Note that a tuple is not exactly an immutable list. Click here to read more about the differences between lists and tuples