AttributeError: module 'xml.etree.ElementTree' has no attribute 'cleanup_namespaces'

[Suitx]

Hi there, having trouble getting formation to work.

Here is what I've done to run into this issue:

1. Starting Formation studio and directly saving the dialog window to simple.xml results in errors printed into console

File "C:\Users\user\AppData\Local\Programs\Python\Python311\Lib\tkinter\__init__.py", line 1948, in __call__
    return self.func(*args)
           ^^^^^^^^^^^^^^^^
  File "C:\Users\user\AppData\Local\Programs\Python\Python311\Lib\site-packages\hoverset\data\actions.py", line 43, in invoke
    return self._func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\user\AppData\Local\Programs\Python\Python311\Lib\site-packages\studio\main.py", line 576, in save
    path = self.context.save()
           ^^^^^^^^^^^^^^^^^^^
  File "C:\Users\user\AppData\Local\Programs\Python\Python311\Lib\site-packages\studio\feature\design.py", line 811, in save
    path = self.designer.save(new_path)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\user\AppData\Local\Programs\Python\Python311\Lib\site-packages\studio\feature\design.py", line 353, in save
    self.builder.write(self.design_path)
  File "C:\Users\user\AppData\Local\Programs\Python\Python311\Lib\site-packages\studio\parsers\loader.py", line 395, in write
    dump.write(file_loader(node=self.root).generate(**pref.get(pref_path)))
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\user\AppData\Local\Programs\Python\Python311\Lib\site-packages\formation\formats\_xml.py", line 90, in generate
    etree.cleanup_namespaces(x_node, top_nsmap=namespaces)
    ^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'xml.etree.ElementTree' has no attribute 'cleanup_namespaces'

2. Afterwards, running the generated xml results in the following console output:

from formation import AppBuilder
app = AppBuilder(path="simple.xml")
app.mainloop()

Traceback (most recent call last):
  File "C:\Projekte\Lightanimations\Playground\POC_tkinter\test_tkinter.py", line 12, in <module>
    app = AppBuilder(path="simple.xml")
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\user\AppData\Local\Programs\Python\Python311\Lib\site-packages\formation\loader.py", line 489, in __init__
    super().__init__(self._app, **kwargs)
  File "C:\Users\user\AppData\Local\Programs\Python\Python311\Lib\site-packages\formation\loader.py", line 265, in __init__
    self.load_path(self._path)
  File "C:\Users\user\AppData\Local\Programs\Python\Python311\Lib\site-packages\formation\loader.py", line 427, in load_path
    tree.load()
  File "C:\Users\user\AppData\Local\Programs\Python\Python311\Lib\site-packages\formation\formats\_xml.py", line 82, in load
    x_node = etree.parse(file).getroot()
             ^^^^^^^^^^^^^^^^^
  File "C:\Users\user\AppData\Local\Programs\Python\Python311\Lib\xml\etree\ElementTree.py", line 1218, in parse
    tree.parse(source, parser)
  File "C:\Users\user\AppData\Local\Programs\Python\Python311\Lib\xml\etree\ElementTree.py", line 580, in parse
    self._root = parser._parse_whole(source)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
xml.etree.ElementTree.ParseError: no element found: line 1, column 0

My setup:

Any advice what's wrong here?

[ObaraEmmanuel]

@Suitx you can install lxml as a quick fix

pip install lxml

[ObaraEmmanuel]

@Suitx there is a new version fixing this issue. If this issue is resolved for you feel free to close it.

[Suitx]

Thanks for the super fast response and fix. Works.