How to extract from a list of objects a list of specific attribute?
Question:
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 do that?
Answers:
Assuming you want field b for the objects in a list named objects do this:
[o.b for o in objects]
The first thing that came to my mind:
attrList = map(lambda x: x.attr, objectList)
are you looking for something like this?
[o.specific_attr for o in objects]
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)
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 do that?
Assuming you want field b for the objects in a list named objects do this:
[o.b for o in objects]
The first thing that came to my mind:
attrList = map(lambda x: x.attr, objectList)
are you looking for something like this?
[o.specific_attr for o in objects]
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)