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?

• Jon Clements: 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.
• juanpa.arrivillaga: you object has no instance attributes

Answer 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

• eng3: I dont know the attribute names. but I see, I can get the list and put the value into setattr
• juanpa.arrivillaga: Don't use dir