Exported type does not have attributes and python default functions.

I have a type in nim
```nim

type PyHttpResponse = ref object of PyNimObjectExperimental
  content*: string
  status*: string
  headers*: TableRef[string, seq[string]]
  version*: string

```
But in python code when I try to do the below it does not work:
```py
instance.__dict__ #PyHttpResponse python instance
instance.content
```
Why is this?