Without taking extra steps for values in the original package that aren't strings (i.e. resources, and probably extras) this line will just replace the entire resource list with the resources in the data_dict.  

```python
old = { 'resources': [ {'a':1}, {'b': 2 }] }
incoming = {'resources': [{'c': 3}]}
new = dict(old.items() + incoming.items())
len(new['resources']) == 1
# news['resources'] only contains {'c': 3}
```