How to extract from a list of objects a list of specific attribute?

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走了就别回头了
走了就别回头了 2020-11-30 06:24

I have a list of objects. Object has 3 string attributes. I want to make a list containing only a specific attribute from class.

Is there any built-in functions to d

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  • 2020-11-30 06:59

    A list comprehension would work just fine:

    [o.my_attr for o in my_list]
    

    But there is a combination of built-in functions, since you ask :-)

    from operator import attrgetter
    map(attrgetter('my_attr'), my_list)
    
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  • 2020-11-30 06:59

    The first thing that came to my mind:

    attrList = map(lambda x: x.attr, objectList)
    
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  • 2020-11-30 07:04

    are you looking for something like this?

    [o.specific_attr for o in objects]
    
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  • 2020-11-30 07:14

    Assuming you want field b for the objects in a list named objects do this:

    [o.b for o in objects]
    
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