[Python-ideas] Add .= as a method return value assignment operator

MRAB python at mrabarnett.plus.com
Thu Sep 27 13:04:55 EDT 2018

On 2018-09-27 14:13, Calvin Spealman wrote:
> Absolutely -1 on this. Consider the following example:
> def encode(s, *args):
>      """Force UTF 8 no matter what!"""
>      return s.encode('utf8')
> text = "Hello, there!"
> text .= encode('latin1')
> Do you see how this creates an ambiguous situation? Implicit attribute 
> lookup like this is really confusing. It reminds me of the old `with` 
> construct in javascript that is basically forbidden now, because it 
> created the same situation.
I don't believe it's ambiguous. The intention is that:

     text .= encode('latin1')

would be equivalent to:

     text = text.encode('latin1')

However, I'm also -1 on it.


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