hasattrs.py

def hasattrs(obj, attrs):
    attrs = attrs.split('.')
    objs = attrs[0]
    for attr in attrs[1:]:
        if hasattr(obj, attr):
            obj = eval('{}.{}'.format(objs, attr))
            objs += '.{}'.format(attr)
        else:
            return False
    return obj


class C():
    d = 233


class B():
    c = C()


class A():
    b = B()


a = A()
print(hasattrs(a, 'a.b.c.d'))
print(hasattrs(a, 'a.b.e.d'))