Python: Sorting dictionary based on value (list)

Question

I have dictionary which has {key : []} format. I need to prepare a list sorted based on the length of the value (length of the list). What's the best way to accomplish this?

Duplicate [sorting a list of dictionary values by date in python][1]? [1]: stackoverflow.com/questions/652291/… — Anton Bessonov
– Anton Bessonov, Commented Oct 27, 2012 at 17:44

Community · Accepted Answer · 2017-05-23 12:15:11Z

4

If you're looking for the values sorted by length, and assuming dict d:

lists_by_length = sorted(d.values(), key=len)

Also see Sort a Python dictionary by value

edited May 23, 2017 at 12:15

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answered Oct 27, 2012 at 17:43

Yuval Adam

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3 Comments

sarat Over a year ago

the list consists of objects from Vertex class and the following errors are occured AttributeError: Vertex instance has no attribute '__len__'

Yuval Adam Over a year ago

The the values aren't naive python lists, or objects that implement __len__. How do you extract the Vertex object's length?

sarat Over a year ago

Thanks for the answer, I added a global function to process the vertex class.

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