using a class as an attribute in python

Question

I am new to python ( coming from Java world ). I have a class which has two attributes. I need another attribute which should be an object.

How can I do that more in a pythonic way?

This is what I have tried

class DummyData():
    def __init__(self,lat,long):
        self.lat = lat
        self.long = long
        self.data = []
loc_1 = DummyData(12,22)
my_data = {
    "mess_11" : 0.002,
    "mess_22" : 2.222,
    "mess_33" : 3.23

}

loc_1.data = my_data

are you asking about init parameters? Can you try to clarify your question? — depperm
– depperm, Commented Apr 27, 2018 at 12:08
DummyData.data is created as list, however, you are assigning dictionary (Java map) into it. Are you sure this is what you want? — Michal Polovka
– Michal Polovka, Commented Apr 27, 2018 at 12:08
Please dont use () as it would make any sense. The contents of () for the class is used for inheritance. — What
– What, Commented Apr 27, 2018 at 12:09

fferri · Accepted Answer · 2018-04-27 12:17:19Z

2

Do you want keyword args?

class DummyData:
    def __init__(self,lat,long,**kwargs):
        self.lat = lat
        self.long = long
        self.data = kwargs

loc_1 = DummyData(12,22,mess_11=0.002,mess_22=2.222,mess_33=3.23)
print(loc_1.data['mess_11']) # 0.002

or just a dict argument?

class DummyData:
    def __init__(self,lat,long,dct):
        self.lat = lat
        self.long = long
        self.data = dct

loc_1 = DummyData(12,22,{
    "mess_11" : 0.002,
    "mess_22" : 2.222,
    "mess_33" : 3.23
})
print(loc_1.data['mess_11']) # 0.002

or what else?

class DummyData:
    def __init__(self,lat,long,dct):
        self.lat = lat
        self.long = long
        self.data = type('myobj', (), dct)

loc_1 = DummyData(12,22,{
    "mess_11" : 0.002,
    "mess_22" : 2.222,
    "mess_33" : 3.23
})
print(loc_1.data.mess_11) # 0.002

edited Apr 27, 2018 at 12:17

answered Apr 27, 2018 at 12:09

fferri

19k8 gold badges57 silver badges110 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

using a class as an attribute in python

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related