def dump(obj):
 for attr in dir(obj):#dir显示类的所有方法
  print(" obj.%s = %r" % (attr, getattr(obj, attr)))

def get_size(obj, seen=None):
 # From https://goshippo.com/blog/measure-real-size-any-python-object/
 # Recursively finds size of objects
 size = sys.getsizeof(obj)
 if seen is None:
  seen = set()
 obj_id = id(obj)
 if obj_id in seen:
  return 0
# Important mark as seen *before* entering recursion to gracefully handle
 # self-referential objects
 seen.add(obj_id)
 if isinstance(obj, dict):
  size += sum([get_size(v, seen) for v in obj.values()])
  size += sum([get_size(k, seen) for k in obj.keys()])
 elif hasattr(obj, '__dict__'):
  size += get_size(obj.__dict__, seen)
 elif hasattr(obj, '__iter__') and not isinstance(obj, (str, bytes, bytearray)):
  size += sum([get_size(i, seen) for i in obj])
 return size