3 Resources/Python/Make dataclass dict-able.md


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---
tags:
  - python
  - "#how-to"
references:
  - https://docs.python.org/3/library/functions.html#vars
  - https://docs.python.org/3/reference/datamodel.html#object.__iter__
---
The `dict` method takes kwargs and creates a dict from that. If we want to pass an object into it the object implement the `__iter__` method.
We can use `vars` to make that easy:
```
def __iter__(self):
  for k, v in vars(self):
    yield k, v
```

> This only works when all vars are primtiives, a list of objects for example needs nested iteration. Example:
```
yield "volumes", [iter(vol) for vol in self.volumes]
```