error of map to html #237

AliceHuangn · 2022-04-18T21:51:16Z

AliceHuangn
Apr 18, 2022

Hi, when I was trying to export my map as html, I got an error: "Exception: 'NoneType' object has no attribute 'comm_id' ". How to fix this problem? Thanks.

Answered by giswqs

Apr 22, 2022

It works fine on my end.

import leafmap
m = leafmap.Map()
m.add_basemap('HYBRID')
m.to_html("mymap.html")
m

View full answer

giswqs · 2022-04-22T00:34:07Z

giswqs
Apr 22, 2022
Maintainer

It works fine on my end.

import leafmap
m = leafmap.Map()
m.add_basemap('HYBRID')
m.to_html("mymap.html")
m

0 replies

confident49loser · 2023-05-15T07:39:19Z

confident49loser
May 15, 2023

I encounter the exact same question.

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
File C:\ProgramData\Anaconda\envs\py39\lib\site-packages\leafmap\leafmap.py:1747, in Map.to_html(self, outfile, title, width, height, add_layer_control, **kwargs)
   1745 self.layout.height = height
-> 1747 self.save(outfile, title=title, **kwargs)
   1749 self.layout.width = before_width

File C:\ProgramData\Anaconda\envs\py39\lib\site-packages\ipyleaflet\leaflet.py:2518, in Map.save(self, outfile, **kwargs)
   2509 """Save the Map to an .html file.
   2510 
   2511 Parameters
   (...)
   2516     Extra parameters to pass to the ipywidgets.embed.embed_minimal_html function.
   2517 """
-> 2518 embed_minimal_html(outfile, views=[self], **kwargs)

File C:\ProgramData\Anaconda\envs\py39\lib\site-packages\ipywidgets\embed.py:302, in embed_minimal_html(fp, views, title, template, **kwargs)
    288 """Write a minimal HTML file with widget views embedded.
    289 
    290 Parameters
   (...)
    300 {embed_kwargs}
    301 """
--> 302 snippet = embed_snippet(views, **kwargs)
    304 values = {
    305     'title': title,
    306     'snippet': snippet,
    307 }

File C:\ProgramData\Anaconda\envs\py39\lib\site-packages\ipywidgets\embed.py:264, in embed_snippet(views, drop_defaults, state, indent, embed_url, requirejs, cors)
    252 """Return a snippet that can be embedded in an HTML file.
    253 
    254 Parameters
   (...)
    261 A unicode string with an HTML snippet containing several `<script>` tags.
    262 """
--> 264 data = embed_data(views, drop_defaults=drop_defaults, state=state)
    266 widget_views = u'\n'.join(
    267     widget_view_template.format(view_spec=escape_script(json.dumps(view_spec)))
    268     for view_spec in data['view_specs']
    269 )

File C:\ProgramData\Anaconda\envs\py39\lib\site-packages\ipywidgets\embed.py:219, in embed_data(views, drop_defaults, state)
    217 if state is None:
    218     # Get state of all known widgets
--> 219     state = Widget.get_manager_state(drop_defaults=drop_defaults, widgets=None)['state']
    221 # Rely on ipywidget to get the default values

File C:\ProgramData\Anaconda\envs\py39\lib\site-packages\ipywidgets\widgets\widget.py:418, in Widget.get_manager_state(drop_defaults, widgets)
    417 for widget in widgets:
--> 418     state[widget.model_id] = widget._get_embed_state(drop_defaults=drop_defaults)
    419 return {'version_major': 2, 'version_minor': 0, 'state': state}

File C:\ProgramData\Anaconda\envs\py39\lib\site-packages\ipywidgets\widgets\widget.py:427, in Widget._get_embed_state(self, drop_defaults)
    422 state = {
    423     'model_name': self._model_name,
    424     'model_module': self._model_module,
    425     'model_module_version': self._model_module_version
    426 }
--> 427 model_state, buffer_paths, buffers = _remove_buffers(self.get_state(drop_defaults=drop_defaults))
    428 state['state'] = model_state

File C:\ProgramData\Anaconda\envs\py39\lib\site-packages\ipywidgets\widgets\widget.py:591, in Widget.get_state(self, key, drop_defaults)
    590 to_json = self.trait_metadata(k, 'to_json', self._trait_to_json)
--> 591 value = to_json(getattr(self, k), self)
    592 if not PY3 and isinstance(traits[k], Bytes) and isinstance(value, bytes):

File C:\ProgramData\Anaconda\envs\py39\lib\site-packages\ipywidgets\widgets\widget.py:57, in _widget_to_json(x, obj)
     56 elif isinstance(x, Widget):
---> 57     return "IPY_MODEL_" + x.model_id
     58 else:

File C:\ProgramData\Anaconda\envs\py39\lib\site-packages\ipywidgets\widgets\widget.py:528, in Widget.model_id(self)
    525 """Gets the model id of this widget.
    526 
    527 If a Comm doesn't exist yet, a Comm will be created automagically."""
--> 528 return self.comm.comm_id

AttributeError: 'NoneType' object has no attribute 'comm_id'

During handling of the above exception, another exception occurred:

Exception                                 Traceback (most recent call last)
Cell In[32], line 3
      1 m = leafmap.Map()
      2 m.add_basemap("HYBRID")
----> 3 m.to_html("mymap.html")
      4 m

File C:\ProgramData\Anaconda\envs\py39\lib\site-packages\leafmap\leafmap.py:1761, in Map.to_html(self, outfile, title, width, height, add_layer_control, **kwargs)
   1758         return out_html
   1760 except Exception as e:
-> 1761     raise Exception(e)

Exception: 'NoneType' object has no attribute 'comm_id'

I've searched online and found no solutions at all. Please help. Thanks a lot.

0 replies

rodrigo-j-goncalves · 2023-09-14T17:14:09Z

rodrigo-j-goncalves
Sep 14, 2023

I came across the same error and made hundreds of tests to find the reason, to no avail.
The error is not related to the network being busy or anything like that. Also, the problem is probably not geemap but some of the underlying libraries (perhaps Ipyleaflet?).

The workaround I found is as follows. Instead of using this (using Ipyleaflet):
Map = geemap.Map(center=[40, -100], zoom=4)

Use folium like this (using folium):
Map = geemapfoliumMap.Map(center=[40, -100], zoom=4)

That way I can export to HMTL with no problems.
Also, it would be interesting to try all other forms of creating interactive maps (eg. Plotly, Pydeck, KeplerGL) and see if the error persists.

Lastly, thanks for this great software!!!

0 replies

giswqs · 2023-09-14T17:16:15Z

giswqs
Sep 14, 2023
Maintainer

Try the following code. If it does not work, it is an ipyleaflet problem.

import ipyleaflet
m = ipyleaflet.Map()
m.save('map.html')

0 replies

rodrigo-j-goncalves · 2023-09-14T17:26:15Z

rodrigo-j-goncalves
Sep 14, 2023

Thanks so much for your answer. Yes, effectively I get the error. In case it is of any use, I copy the error log below.

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Cell In[108], line 3
      1 import ipyleaflet
      2 m = ipyleaflet.Map()
----> 3 m.save('map.html')

File ~/.virtualenvs/VirtEnvRG002_geo/lib/python3.10/site-packages/ipyleaflet/leaflet.py:2637, in Map.save(self, outfile, **kwargs)
   2627 def save(self, outfile, **kwargs):
   2628     """Save the Map to an .html file.
   2629 
   2630     Parameters
   (...)
   2635         Extra parameters to pass to the ipywidgets.embed.embed_minimal_html function.
   2636     """
-> 2637     embed_minimal_html(outfile, views=[self], **kwargs)

File ~/.virtualenvs/VirtEnvRG002_geo/lib/python3.10/site-packages/ipywidgets/embed.py:302, in embed_minimal_html(fp, views, title, template, **kwargs)
    286 @doc_subst(_doc_snippets)
    287 def embed_minimal_html(fp, views, title='IPyWidget export', template=None, **kwargs):
    288     """Write a minimal HTML file with widget views embedded.
    289 
    290     Parameters
   (...)
    300     {embed_kwargs}
    301     """
--> 302     snippet = embed_snippet(views, **kwargs)
    304     values = {
    305         'title': title,
    306         'snippet': snippet,
    307     }
    308     if template is None:

File ~/.virtualenvs/VirtEnvRG002_geo/lib/python3.10/site-packages/ipywidgets/embed.py:264, in embed_snippet(views, drop_defaults, state, indent, embed_url, requirejs, cors)
    243 @doc_subst(_doc_snippets)
    244 def embed_snippet(views,
    245                   drop_defaults=True,
   (...)
    250                   cors=True
    251                  ):
    252     """Return a snippet that can be embedded in an HTML file.
    253 
    254     Parameters
   (...)
    261     A unicode string with an HTML snippet containing several `<script>` tags.
    262     """
--> 264     data = embed_data(views, drop_defaults=drop_defaults, state=state)
    266     widget_views = '\n'.join(
    267         widget_view_template.format(view_spec=escape_script(json.dumps(view_spec)))
    268         for view_spec in data['view_specs']
    269     )
    271     if embed_url is None:

File ~/.virtualenvs/VirtEnvRG002_geo/lib/python3.10/site-packages/ipywidgets/embed.py:219, in embed_data(views, drop_defaults, state)
    215         views = [views]
    217 if state is None:
    218     # Get state of all known widgets
--> 219     state = Widget.get_manager_state(drop_defaults=drop_defaults, widgets=None)['state']
    221 # Rely on ipywidget to get the default values
    222 json_data = Widget.get_manager_state(widgets=[])

File ~/.virtualenvs/VirtEnvRG002_geo/lib/python3.10/site-packages/ipywidgets/widgets/widget.py:445, in Widget.get_manager_state(drop_defaults, widgets)
    443     widgets = _instances.values()
    444 for widget in widgets:
--> 445     state[widget.model_id] = widget._get_embed_state(drop_defaults=drop_defaults)
    446 return {'version_major': 2, 'version_minor': 0, 'state': state}

File ~/.virtualenvs/VirtEnvRG002_geo/lib/python3.10/site-packages/ipywidgets/widgets/widget.py:454, in Widget._get_embed_state(self, drop_defaults)
    448 def _get_embed_state(self, drop_defaults=False):
    449     state = {
    450         'model_name': self._model_name,
    451         'model_module': self._model_module,
    452         'model_module_version': self._model_module_version
    453     }
--> 454     model_state, buffer_paths, buffers = _remove_buffers(self.get_state(drop_defaults=drop_defaults))
    455     state['state'] = model_state
    456     if len(buffers) > 0:

File ~/.virtualenvs/VirtEnvRG002_geo/lib/python3.10/site-packages/ipywidgets/widgets/widget.py:609, in Widget.get_state(self, key, drop_defaults)
    607 for k in keys:
    608     to_json = self.trait_metadata(k, 'to_json', self._trait_to_json)
--> 609     value = to_json(getattr(self, k), self)
    610     if not drop_defaults or not self._compare(value, traits[k].default_value):
    611         state[k] = value

File ~/.virtualenvs/VirtEnvRG002_geo/lib/python3.10/site-packages/ipywidgets/widgets/widget.py:54, in _widget_to_json(x, obj)
     52     return [_widget_to_json(v, obj) for v in x]
     53 elif isinstance(x, Widget):
---> 54     return "IPY_MODEL_" + x.model_id
     55 else:
     56     return x

File ~/.virtualenvs/VirtEnvRG002_geo/lib/python3.10/site-packages/ipywidgets/widgets/widget.py:546, in Widget.model_id(self)
    541 @property
    542 def model_id(self):
    543     """Gets the model id of this widget.
    544 
    545     If a Comm doesn't exist yet, a Comm will be created automagically."""
--> 546     return self.comm.comm_id

AttributeError: 'NoneType' object has no attribute 'comm_id'

1 reply

giswqs Sep 14, 2023
Maintainer

Report it at https://github.com/jupyter-widgets/ipyleaflet/issues

rodrigo-j-goncalves · 2023-09-14T17:52:00Z

rodrigo-j-goncalves
Sep 14, 2023

Well, now that we narrowed it down a bit more, it seems that the problem might be 'environment-dependent'.
I don't know about the OP but I am using Jupyterlab. According ipyleaflet github:
"If you are using JupyterLab <=2, you will need to install the JupyterLab extension:
jupyter labextension install @jupyter-widgets/jupyterlab-manager jupyter-leaflet"
(there are also instructions for classic Jupyter Notebooks)

I am using JupyterLab 4.0.5 but I tried anyway (installed the extension) and the error is gone.
I will however report it just in case...

Thanks again for geemap, for your help and for being so responsive.

0 replies

giswqs · 2023-09-14T17:56:32Z

giswqs
Sep 14, 2023
Maintainer

Jupyterlab 4.x also has some issues with ipyleaflet. See jupyterlab/jupyterlab#14829

0 replies

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error of map to html #237

AliceHuangn Apr 18, 2022

Replies: 7 comments · 1 reply

giswqs Apr 22, 2022 Maintainer

confident49loser May 15, 2023

rodrigo-j-goncalves Sep 14, 2023

giswqs Sep 14, 2023 Maintainer

rodrigo-j-goncalves Sep 14, 2023

giswqs Sep 14, 2023 Maintainer

rodrigo-j-goncalves Sep 14, 2023

giswqs Sep 14, 2023 Maintainer

AliceHuangn
Apr 18, 2022

Replies: 7 comments 1 reply

giswqs
Apr 22, 2022
Maintainer

confident49loser
May 15, 2023

rodrigo-j-goncalves
Sep 14, 2023

giswqs
Sep 14, 2023
Maintainer

rodrigo-j-goncalves
Sep 14, 2023

giswqs Sep 14, 2023
Maintainer

rodrigo-j-goncalves
Sep 14, 2023

giswqs
Sep 14, 2023
Maintainer