Why does `getattr` not support consecutive attribute retrievals?

Question

class A(): pass

a = A()
b = A()

a.b = b
b.c = 1

a.b     # this is b
getattr(a, \"b\") # so is this

a.b.c   # this is 1   
getattr(a, \"b.c\") # this raises an Attrib         


        

Answer 1

You can call the multiple getattr without calling a function within function by splitting the dot operators and performing a getattr() for each dot operator

def multi_getattr(self,obj, attr, default = None):
          attributes = attr.split(".")
          for i in attributes:
              try:
                  obj = getattr(obj, i)
              except AttributeError:
                  if default:
                      return default
                  else:
                      raise
          return obj

If suppose you wish to call a.b.c.d you can do it via a.multi_getattr('b.c.d'). This will generalise the operation without worrying about the count of dot operation one has in the string.