Kedro

Hello there!

Is there a way to get the input name inside a node function?
For example,

```
node(func=melt_data, inputs="fcl_elevation")
...

def melt_data(df):
    # how to get "fcl_elevation" inside func?
```

So there are two ways I can think of doing this, but both acknowledging that we want to have pure python functions that have no ability to actually load/save outside of their scope

`before_node_run` doesn't pass anything to the node, but you can often achieve the same goals

The other option is to partially apply your node

Discussion on how to do this here: https://stackoverflow.com/questions/58875820/how-to-pass-a-literal-value-to-a-node

You can also do this using kwargs:
```
def melt_data(**kwargs):
    print(kwargs)

node(f, inputs={"fcl_elevation": "fcl_elevation"}, None)
```