Sorting a nested list of Objects with specific method

Question

Say I have a nested list of objects that have a method called get_name(), which gives you a name for the object, and you have to sort the lists by alphabetical order.

my_list = [[obj1, obj2, obj3], [obj4, obj5, obj6], [obj7, obj8]]

But I don't know how to make it work with a list of objects, specifically with get_name() as the main method to use, it also has to be assumed that only the list within the list has to be sorted.

Any help is appreciated!

stasdeep · Accepted Answer · 2018-07-25 14:38:41Z

3

How about simple for loop?

comparator = lambda obj: obj.get_name()
for sub_list in my_list:
    sub_list.sort(key=comparator)

edited Jul 25, 2018 at 14:38

answered Jul 25, 2018 at 14:31

stasdeep

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Comments

John Zwinck · Accepted Answer · 2018-07-25 14:31:29Z

1

It could be as simple as:

for sub in my_list:
    sub.sort(key=MyClass.get_name)

This will sort each sublist in-place, using the result of get_name() to determine the order.

answered Jul 25, 2018 at 14:31

John Zwinck

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2 Comments

stasdeep Over a year ago

That will only work if all the objects are instances of MyClass which is not necessarily true.

John Zwinck Over a year ago

@stasdeep: Rather than obliquely complain about my answer, why not call attention to the merits of your own by explaining in an edit why one might choose to use a lambda rather than a direct function call.

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