Suggestion: make sequence and map interfaces more similar

[Jussi Piitulainen]

Steven D'Aprano writes:

> On Wed, 30 Mar 2016 06:12 pm, Jussi Piitulainen wrote:
>
>> Steven D'Aprano writes:
>> 
>>> Given a surjection (many-to-one mapping)
>> 
>> No. And I doubt that Wikipedia says that.
>
> No to what? What are you disagreeing with?

Surjection does not mean many-to-one mapping. It means something else.