Code Issues in Chapter 4.3

[lam1aa]

• This chapter is a bit confusing regarding where each code part should be placed. Providing one admonition with the full code might help, or alternatively, creating separate UI and Server sections similar to other chapters. I was unsure where section 4.3.3 should be added.
• After adding the code from 4.3.4, I received the Error: could not find function data_by_bezirk, and the map was not displayed in the dashboard.