[Python-ideas] Add "equal" builtin function

[Filipp Bakanov]

For now there are many usefull builtin functions like "any", "all", etc.
I'd like to propose a new builtin function "equal". It should accept
iterable, and return True if all items in iterable are the same or iterable
is emty.
That's quite popular problem, there is a discussion of how to perform it on
stackoverflow (
http://stackoverflow.com/questions/3844801/check-if-all-elements-in-a-list-are-identical)
- all suggestions are either slow or not very elegant.
What do you think about it?
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