KV - TypeError on comment after canvas:

[KeyWeeUsr]

When working with kv this jumps out if I place a comment(even with ##) after canvas:. It should appear even with .before/.after because it's the same block of code in parser.

<Something>:
    canvas: # error comment
        Color: # nothing
            rgba: 0, 0, 0, 0
        Rectangle: # nothing
            pos: self.pos
            size: self.size

 Traceback (most recent call last):
   File "C:\Users\...\main.py", line 341, in 
     My().run()
   File "C:\Users\...\Py27_11\lib\site-packages\kivy\app.py", line 801, in run
     self.load_kv(filename=self.kv_file)
   File "C:\Users\...\lib\site-packages\kivy\app.py", line 598, in load_kv
     root = Builder.load_file(rfilename)
   File "C:\Users\...\Py27_11\lib\site-packages\kivy\lang\builder.py", line 300, in l
oad_file
     return self.load_string(data, **kwargs)
   File "C:\Users\...\Py27_11\lib\site-packages\kivy\lang\builder.py", line 347, in l
oad_string
     parser = Parser(content=string, filename=fn)
   File "C:\Users\...\Py27_11\lib\site-packages\kivy\lang\parser.py", line 392, in __
init__
     self.parse(content)
   File "C:\Users\...\Py27_11\lib\site-packages\kivy\lang\parser.py", line 494, in pa
rse
     objects, remaining_lines = self.parse_level(0, lines)
   File "C:\Users\...\Py27_11\lib\site-packages\kivy\lang\parser.py", line 657, in pa
rse_level
     if current_property[:3] == 'on_':
 TypeError: 'NoneType' object has no attribute '__getitem__'

[saqib1707]

@KeyWeeUsr This shows that one can put comments in a separate line and not at the end of a line.But first of all putting comments at the end of any line except canvas: or canvas.before(after) doesn't produces any error(which it should have) .
I think to remove all types of comments we can add a extra check like here.

[FluxIX]

If the parser used regular expressions on a line-level comments could appear at the end of lines.

[KeyWeeUsr]

Not at all. That part of the code handles all lines, while for this to work there has to be again introduced the same separation of blob: as kv element and <everything after :> as Python as for widgets, which would change the # error comment string to a comment and wouldn't raise an error.

with this check or with regex a single '#' in a property would trigger EOL error. This isn't really about removing the line in-place, it has to be done sooner/later.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[Julian-O]

Marking this a duplicate of #6657 (even though it is earlier).