Programmatically assign python3 class instance attributes

Question

I may have a few dozen different classes instances with varying attributes that I just need to put patterns/random values into and don't want to have to manually code it all out. Is there a way to loop thru the attributes in a class instance?

For example:

class test_class:
   attr1=0
   attr2=0
   attr3=0
i=test_class()
#How do I do the below in a loop without knowing the attribute names?
i.attr1=1
i.attr2=1
i.attr3=1

I know how I can get a list/dict of the attributes, but how do I do it so I can assign values to those attributes? How do I programmatically loop thru the class instance attributes and assign new values?

I'm not sure what you're trying to do here... do you really want class attributes vs instance attributes here? Could you give a use case as this currently looks very anti-Pythonic. — Jon Clements
– Jon Clements, Commented Jan 27, 2021 at 12:37

OranShuster · Accepted Answer · 2021-01-27 12:39:02Z

1

if you know the attribute names you can just use setattr
If you just want to get a list of all object's attributes you can use dir

answered Jan 27, 2021 at 12:39

OranShuster

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2 Comments

eng3 Over a year ago

I dont know the attribute names. but I see, I can get the list and put the value into setattr

juanpa.arrivillaga Over a year ago

Don't use dir

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