Give feedback on Python and R sessions

[richelbilderbeek]

On 2024-09-27, RB volunteered to give feedback by PR, so that teachers of those sessions can disagree.

[richelbilderbeek]

Progress:

• [x] #40 discussed by Björn
• [x] #41 discussed by Birgitte
• [x] #43 discussed by Pedro

[richelbilderbeek]

Done for this round!