Thanks for your feedback!

Any suggestions on how this could look like? I'm thinking of having a product_prefix like this:

- source: example_task.py
   name: example-task
   product:
       data: output/output_dataframe.csv
   grid:
       input_dataframe: ['birds.csv', 'fish.csv', 'flowers.csv']
   product_suffix: '_{{input_dataframe}}'

Then, the outputs would be 'output/output_dataframe_birds.csv', etc.

Yes! Something like that would be great.

I forgot this in the original issue description, but I think the suffix also should be (optionally) added to the task name. So that the name can be the same as the products. So maybe task_suffix or task_name_suffix would be better. And I think the suffix field should be able to take a separate list like:
task_name_suffix: ['birds', 'fish', 'flowers']

Edit: Perhaps a task_name_prefix field could be added as well.

I like the product_suffix as well. Would be nice to apply to task_suffix as well.

That way if you had something like:

grid:
   param1: [1,2,3,4]
   param2: [a,b,c,d]

you could do, product_suffix: '-{{param1}}-{{param2}}'