Does iterating through a string slice create a new object? [duplicate]

Question

Let's say I have a str of length 5: Hello. If I wanted to iterate through every character from index 1 on, I'd do it like this:

s = 'Hello'
for c in s[1:]:
    # do something

Does looping like this create a new str object of length 4? I can see it being very memory inefficient with bigger strings...

It does, and it is. If this is a concern, I think itertools.islice might be of use — jonrsharpe
– jonrsharpe, Commented Jun 28, 2016 at 7:55
Oh yeah, it's the exact same question. I guess I didn't know how to properly word it. — shooqie
– shooqie, Commented Jun 28, 2016 at 8:05
@shooqie No worries, appreciated for marking it as a duplicate yourself and having a thoughtful question. Just an FYI, Google can often be a better resource than the Stack Overflow search bar for finding questions on Stack Overflow, as strange as that may sound. — miradulo
– miradulo, Commented Jun 28, 2016 at 8:07

Amit Gold · Accepted Answer · 2016-06-28 07:54:22Z

1

Yes it does.

Also, doing s[:] will create a new string identical to the previous.

This works the same with lists too.

answered Jun 28, 2016 at 7:54

Amit Gold

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