inconsistency with += between different types ?

[Bernhard Herzog]

"Donn Cave" <donn at u.washington.edu> writes:

> For example, I'm surprised that UserString modifies in place.

It does indeed! Looks like a bug to me especially considering that
there's also a MutableString class. The __iadd__ and __imul__ methods
should be in MutableString instead of UserString IMO. I filed a bug
report for it (592573).

OTOH, nowadays the string types can be sub-classed so that UserString
behaving exactly like a builtin string may not be that important
anymore.

   Bernhard

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