Can I make my experiment interactive by Psychopy?

Online experiments
5

You might find some of these online demos or code snippets useful.

However, in principle you might want something like:

if key_resp.keys == 'r':
    condFile = 'rabbits.xlsx'
    animal = 'rabbit'
else:
    condFile = 'birds.xlsx'
    animal = 'bird'

Then use $condFile for your trials look and your instructions
might look something like

$'Press the space bar whenever you see a '+animal+'.\n\nPress the spacebar now to start.'