Further to me recent post “A Folder Action to encode a script to be Opened in Editor”, I have updated the GitHub Gist noting that

AppleScript Editor exports a decompiled version of your compiled script which may
contain line continuation characters that the Python urllib.parse finds unpalatable. 
Thus, instead of merely catenating the .AppleScript into the output file, we do 
`iconv -f iso-8859-1 -t UTF-8 " & scriptInputName ...`  
to create a UTF-8 file that Python is happy with.