Get attribute of an object array as an array in python

Question

I have created a class in python as below

class Member:
    def __init__(self, kalmanBoxTracker):
        self.member_id = kalmanBoxTracker.id
        self.member_area = kalmanBoxTracker.kf.x[2]

Then I have created an array of this object like this:

for trk in trackers:
   ret_mem.append(Member(trk))

How I can get the member_area attribute of ret_mem array as an array?

Try list comprehension.

Rohit Jain
– Rohit Jain

2020-04-16 08:32:16 +00:00
Commented Apr 16, 2020 at 8:32 — Rohit Jain
– Rohit Jain, Commented Apr 16, 2020 at 8:32

Gabio · Accepted Answer · 2020-04-16 08:35:00Z

2

Try this:

member_areas = [m.member_area for m in ret_mem]

answered Apr 16, 2020 at 8:35

Gabio

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2 Comments

Mohammad Hossein Over a year ago

Thanks for your reply. The output of above line is a list, but I need a numpy array. I could convert the output list of this command to a numpy array by numpy.asarray(member_areas)

Gabio Over a year ago

Happy to help :)

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