On Tue, Mar 31, 2020 at 07:32:11PM -0000, [email protected] wrote:
> If I understand you are proposing a change from StringIO `write`
> method to `+=` operator. Is it right?
No, that is not correct. The StringIO.write() method will not be changed
or removed. The proposal is to extend the class with the `+=` operator
which will add as equivalent to calling write().
> I cannot see any advantage on this proposal since there is no real
> change in the implementation of StringIO. Or are you proposing any
> change in the underlying implementation and I have missed that point?
This proposal isn't about enhancing StringIO's functionality.
The purpose of this proposal is targetted at people who are using string
concatenation instead of assembling a list then calling join. It is
about leveraging StringIO's ability to behave as a string builder to
give people a minimally invasive change from the string concatenation
anti-pattern:
buf = ''
# repeated many times
buf += 'substring'
to something which can be efficient on all Python interpreters:
buf = StringIO()
buf += 'substring'
buf = buf.getvalue()
> In this case, I disagree with you: StringIO is a stream and I think
> that it is wrong to make it to "look & feel" like a string. That is my
> opinion.
Paul has not suggested making StringIO look and feel like a string.
Nobody is going to add 45+ string methods to StringIO. This is a minimal
extension to the StringIO class which will allow people to improve their
string building code with a minimal change.
--
Steven
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