Is there a canonical way to check whether an iterable is ordered?

Chris Angelico rosuav at
Thu Sep 18 14:10:42 CEST 2014

On Thu, Sep 18, 2014 at 9:55 PM, cool-RR <ram.rachum at> wrote:
> My function gets an iterable of an unknown type. I want to check whether it's ordered. I could check whether it's a `set` or `frozenset`, which would cover many cases, but I wonder if I can do better. Is there a nicer way to check whether an iterable is ordered or not?

An iterable is always ordered. You call next() and you get the next
value. Are you asking if there's a way to find out if the order
matters? Not easily. What's your use-case? Why do you need to know?

Also, you're still using Google Groups, which means your formatting is
b0rked. Please can you use something better, or else look into fixing


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