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Is there an easy quick way to set a different text font to tableview contents?

If I correctly understand the question:

elements_txt = ui.TableView()
elements_txt.text_color = 'black'
elements_txt.font= ('Courier',12)

Thanks for the tip. I managed to change the font by passing my ListDataSource object instead of the tableview name. Is that ok?

No idea, sorry

I also use the delegate tableview_cell_for_row to change the content of the cell

cell = ui.TableViewCell()
cell.text_label.text_color = 'green'
cell.accessory_type = 'detail_button'

selected_cell = ui.View()
selected_cell.border_color = 'black'
selected_cell.border_width = 2
selected_cell.corner_radius = 10
selected_cell.bg_color = 'cornflowerblue'

cell.selected_background_view = selected_cell

Now that's interesting. Where should we put that code?

So, I assume we are able to define a custom formatting to individual cells. I am particularly interested at this point in changing cell background color and maybe text color or font, according to certain criteria, while creating the tableview or adding cells.

At this point I have a tableview named 'mutable' made with the designer and I am calling it with this simple code:

    mydatasource = ui.ListDataSource(DADOS)

    v = ui.load_view('my-GUI-app')
    v['mytable'].data_source = mydatasource 
    v['mytable'].delegate = mydatasource

    mydatasource.font =  ('Helvetica Neue', 14)
    v.present('sheet')

Is my usage of ListDataSource preventing me from adding that kind of formatting to cells? Should I use other way?

I don't use pyui file, I build the ui.view in my script, but perhaps you could use the same feature of delegate with a pyui file.

class my_list(ui.View):
        def __init__(self):
            ...
            elements_txt.delegate  = self
        def tableview_cell_for_row(self, tableview, section, row):
            cell = ui.TableViewCell()

v = my_list()
v.present(...)

You can also find an entire good example of @Phuket2 here

I really got to try Pythonista ui by coding directly in the script, instead of using the graphical designer. I am trying to find some seasy step-by-step tutorials. I have recently had a similar struggle with tkinter :-)

I build my UI using the UI designer and then I copy the JSON into a string inside of the code. Then I load the view using ui.load_view_str(). Another way you could do it.
Example: https://github.com/TutorialDoctor/The-Bible-App/blob/master/the_bible.py

Nice!
I didn't know that
I learn each day

I am right now dissecting a sample tableview in order to better understand how it works. It's starting to make some sense in my head, but I am still figuring things out.