Sort singletons into first charatcer folders

[tarz4n]

Two questions i hope to get some help with:

Im sorting my collection of singletons into first letter. How can i set it to always sort into an upcase first letter, and prevent having folders called both "A" and "a" ?

singleton: %left{$artist,1}/$artist - $title | $year, $genre

Also, im looking into grouping anything else (0-9) into the folder "#" can this be done?

[arogl]

Two questions i hope to get some help with:

Im sorting my collection of singletons into first letter. How can i set it to always sort into an upcase first letter, and prevent having folders called both "A" and "a" ?

singleton: %left{$artist,1}/$artist - $title | $year, $genre

Also, im looking into grouping anything else (0-9) into the folder "#" can this be done?

Try this
singleton: %upper{%left{$artist,1}}/$artist - $title | $year, $genre

And look at the bucket plugin.
or via the inline

plugins: inline

item_fields:
  dirfield: |
    nme = artist[0].upper()
    if artist[0].isdigit(): 
      nme = "#"
    return nme

paths:
 singleton: $dirfield/$artist - $title | $year, $genre

or

plugins: inline

item_fields:
  dirfield: |
    nme = artist[0].upper()
    if artist[0].isdigit(): 
      if int(artist[0]) in range(0,9):
        nme = "#"
    return ```yaml
plugins: inline

item_fields:
  dirfield: |
    return "#" if artist[0].isdigit() else artist[0].upper()

paths:
 singleton: $dirfield/$artist - $title | $year, $genre

play around with the inline code above, I may have it wrong.