result = [obj.f() for f in [append, attrs]]

result = [f() for f in [obj.append, obj.attrs]]

result = [getattr(obj, m)() for m in ["append", "attrs"]]

methods = [methodcaller(m) for m in ["append", "attrs"]]
results_for_obj_a = [f(obj_a) for f in methods]
results_for_obj_b = [f(obj_b) for f in methods]
# etc.

methodcaller(method_name)(obj) == getattr(obj, method_name)()