bracket | A lisp like programming language | Interpreter library

Can anyone explain to me why this code:

i try to parse JSON array with format from file like this

I was trying to scape a link out of a .eml file but somehow I always get "NONE" as return for my search. But I don't even get the link with the confirm brackets, no problem in getting that valid link once the string is pulled.

One problem that I see is, that the string that is found by the REGEX has multiple lines, but the REGES itself seems to be valid.

CODE/REGEX I USE:

For educational purpose I am using Python, Tkinter and Sqlite to create small prefabricated sentences, with small language templates like text.insert (tk.END, f "{City_Name} {is a city that owns} {Inhabitants} {inhabitants} {on a surface of} {Surface} "). The result should be (by way of example I remain the parentheses): {Paris} {is a city that owns} {2 229 095} {inhabitants} {on an area of} {105 km²}

The app starts with the selection of the Country in a combobox and then with the selection of the City in the combobox in the next combobox, for example "Paris", which in the database corresponds to City_Name. So the whole app focuses on city selection in the second combobox. So how can I retrieve from the row all the other data (Inhabitants, Name inhabitants, Surface, Language of the database) corresponding to "Paris", in order to automatically display them in the textobox, replacing them when requested?

To replace them when prompted automatically when prompted, I mean the curly brackets in text.insert, i.e. {Inhabitants}, {Surface}, etc.

IMPORTANT: In this way, I don't have to write the code for every single city, but I can write only one code that is valid for all the cities, because they automatically change {City_Name}, {Inhabitants}, {Surface}

P.S: I don't want to focus on a specific city, but obviously when you change the name of the city in the Combobox City, the data also changes (the row of data in the database), taking those corresponding to the selected city.

Can you please help me and show me the part of the code I need? Thank you

I am trying to learn data-cleaning with simple code.

My central question is: what is the use of two single square brackets side by side?

Here is df as an example.

I want to create a paragraph in embeds like this:

I'm trying to iterate over a List of objects, for each of the object I want to display a composable card. The problem is that you cant call Composable functions from inside the list.forEach{} brackets.

The Code:

I have the following code to which I tried to apply generics.

When defining a syntax, it is possible to match 1 or more times (+) or 0 or more times (*) similarly to how it is done in regex. However, I have not found in the rascal documentation if it is possible to also match a Symbol a specific amount of times. In regex (and Rascal patterns) this is done with an integer between two curly brackets but this doesn't seem to work for syntax definition. Ideally, I'd want something like: