Update nbconvert pinning

pyproject.toml

@@ -39,7 +39,7 @@ dependencies = [
     "jupyter_server>=1.18,<2.0.0",
     "jupyterlab_server>=2.3.0,<3",
     "nbclient>=0.4.0,<0.7",
-    "nbconvert>=6.4.5,<7",
+    "nbconvert>=6.4.5,<8",
     "traitlets>=5.0.3,<6",
     "websockets>=9.0",
 ]
@@ -96,7 +96,7 @@ path = "hatch_build.py"
 [tool.hatch.build.targets.sdist]
 exclude = [
     ".github",
-    "*.gif",    
+    "*.gif",
 ]
 
 [tool.hatch.build.hooks.jupyter-builder]

tests/notebooks/print_parameterized.ipynb

@@ -43,5 +43,5 @@
   }
  },
  "nbformat": 4,
- "nbformat_minor": 4
-}
+ "nbformat_minor": 5
+}

voila/exporter.py

@@ -28,21 +28,25 @@
 class VoilaMarkdownRenderer(IPythonRenderer):
     """Custom markdown renderer that inlines images"""
 
+    def __init__(self, contents_manager, *args, **kwargs):
+        self.contents_manager = contents_manager
+        super().__init__(*args, **kwargs)
+
     def image(self, src, title, text):
-        contents_manager = self.options['contents_manager']
+        contents_manager = self.contents_manager
         if contents_manager.file_exists(src):
             content = contents_manager.get(src, format='base64')
             data = content['content'].replace('\n', '')  # remove the newline
             mime_type, encoding = mimetypes.guess_type(src)
             src = 'data:{mime_type};base64,{data}'.format(mime_type=mime_type, data=data)
-        return super(VoilaMarkdownRenderer, self).image(src, title, text)
+        return super().image(src, title, text)
 
 
 class VoilaExporter(HTMLExporter):
     """Custom HTMLExporter that inlines the images using VoilaMarkdownRenderer"""
 
     base_url = traitlets.Unicode(help="Base url for resources").tag(config=True)
-    markdown_renderer_class = traitlets.Type('mistune.Renderer').tag(config=True)
+    markdown_renderer_class = traitlets.Type(VoilaMarkdownRenderer).tag(config=True)
     # Can be a ContentsManager from notebook or jupyter_server, so Any will have to do for now
     contents_manager = traitlets.Any()