x = "hello, world"
print(x.replace("h","j")
so from this code you can change the letter h to j so that means it is mutable
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Does this answer your question? [Why doesn't calling a Python string method do anything unless you assign its output?](https://stackoverflow.com/questions/9189172/why-doesnt-calling-a-python-string-method-do-anything-unless-you-assign-its-out) – Gino Mempin Aug 03 '20 at 10:13
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so that means it is mutable
No, Python strings are not mutable. str.replace (and any other string method) return a new string.
If strings were mutable then the following code
x = "hello, world"
x.replace("h","j")
print(x)
Would output jello, world (which it does not).
DeepSpace
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It doesnt mean that string is mutable it means that we are creating a new string in the replace method.
>>> a= "ababa"
>>> id(a)
48421600L
>>> id(a.replace('a','c'))
48419776L
>>>
as you can see from the id of the strings, that they are two different strings. Or you can use the is operator for comparison also.
Albin Paul
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there are unique during their lifetimes, which is the case for this comparison so i dont see the issue. – Albin Paul Aug 02 '20 at 10:55
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Strings are immutable in python.
>>> x = 'hello, world'
>>> x
[OUT]: 'hello, world'
>>> id(x)
[OUT]: 4400926320
>>> x = x.replace('h','j')
>>> x
[OUT]: 'jello, world'
>>> id(x)
[OUT]: 4402216304
When you you try to modify a value of a string object it points to a new string with different location in the memory as strings are immutable. id(x) returns the memory address of x.
shivamgamer
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