The following works on currently latest macOS I'm using (High Sierra 10.13.5 Beta) and latest iTunes (12.7.4.76).
I've written an AppleScript that is using UI Scripting and compiles a list of purchased songs on iTunes. The script will open a new TextEdit document and fill in the songs in a comma delimited format and will contain the sequential number, song name, artist, album and song duration. The output will be similar to this:
"Nr","Song Name","Artist","Album","Duration"
"1","Badinerie","Lucero Tena","Lección de castañuelas","1:03"
"2","El colibrí","Lucero Tena","Lección de castañuelas","1:07"
"3","El relicario","Lucero Tena","Lección de castañuelas","1:36"
Here is the script:
tell application "iTunes" to activate
tell application "TextEdit"
activate
make new document at the front with properties {name:"iTunes purchased.txt"}
delay 1
tell application "System Events" to click menu item "Make Plain Text" of menu 1 of menu bar item "Format" of menu bar 1 of application process "TextEdit"
end tell
tell application "iTunes" to activate
tell application "System Events"
keystroke "1" using {command down}
set w to window "iTunes" of application process "iTunes"
click radio button "Store" of radio group 1 of w
delay 2
set webarea to UI element 1 of scroll area 1 of group 1 of group 1 of splitter group 1 of w
click static text 1 of UI element 1 of group 6 of list 2 of webarea
delay 2
click radio button "All" of tab group 1 of group 2 of webarea
delay 3
click radio button "Songs" of tab group 1 of group 5 of webarea
delay 5
set allRows to UI elements of table 1 of webarea
set entireContent to quote & "Nr" & quote & "," & quote & "Song Name" & quote & "," & quote & "Artist" & quote & "," & quote & "Album" & quote & "," & quote & "Duration" & quote & return
tell application "TextEdit" to activate
repeat with aRow in allRows
if class of aRow is row then
set gr to UI element 1 of group 1 of UI element 2 of aRow
if class of gr is group then
set songNum to value of static text 1 of group 1 of UI element 1 of aRow
set songName to value of static text 1 of group 2 of UI element 2 of aRow
set songArtist to value of static text 1 of group 1 of UI element 1 of UI element 3 of aRow
set album to UI element 1 of UI element 4 of aRow
set songAlbum to ""
if (count of UI elements of album) is greater than 0 then
set songAlbum to value of static text 1 of group 1 of album
end if
set songDuration to ""
set dur to UI element 5 of aRow
if (count of UI elements of dur) is greater than 0 then
set songDuration to value of static text 1 of group 1 of dur
end if
set aLine to quote & songNum & quote & "," & quote & songName & quote & "," & quote & songArtist & quote & "," & quote & songAlbum & quote & "," & quote & songDuration & quote
set entireContent to entireContent & aLine & return
tell application "TextEdit" to set text of front document to entireContent
end if
end if
end repeat
end tell
The process is not fast, on my computer it takes about 1 second per song so be prepared to wait a while. Also, if you start getting some "out of index" errors try, while the script is running, scrolling the iTunes song list in the background to make sure the entire list content is loaded before being accessed by AppleScript.