Code in the body of a class - 7

test.py

# If you legitimately need to get in there before class definition, say because you're generating something that already has a metaclass
# that needs to run (e.g. dynamically generating Django models), you could use type(), like this:
def class_factory_1(num_attrs):
    attrs = {"var_{}".format(i): i for i in range(num_attrs)}
    return type("Klass", (SomeBaseClass,), attrs)

# Otherwise you could use a regular old class definition for a slightly less smartypants solution
def class_factory_2(num_attrs):
    class Inner(object):
        pass
    
    for i in range(num_attrs):
        setattr(Inner, "var_{}".format(i), i) 
    
    return Inner

# Or simply this, if you can wait until after __init__
class Foo(object):
    def __init__(self, num_attrs):
        for i in range(num_attrs):
            # or self.__class__ perhaps
            setattr(self, "var_{}".format(i), i)