No module named EmbedPostProcessor

[michaelplews]

when trying to call jupyter nbextension, the following error message occurs:

[NbConvertApp] WARNING | Error loading config file: jupyter_nbconvert_config
Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/ipython_genutils/importstring.py", line 33, in import_item
    pak = getattr(module, obj)
AttributeError: module 'jupyter_contrib_nbextensions.nbconvert_support' has no attribute 'EmbedPostProcessor'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/jupyter_core/application.py", line 202, in load_config_file
    path=path
  File "<decorator-gen-5>", line 2, in load_config_file
  File "/usr/local/lib/python3.5/dist-packages/traitlets/config/application.py", line 87, in catch_config_error
    return method(app, *args, **kwargs)
  File "/usr/local/lib/python3.5/dist-packages/traitlets/config/application.py", line 603, in load_config_file
    self.update_config(new_config)
  File "/usr/local/lib/python3.5/dist-packages/traitlets/config/configurable.py", line 198, in update_config
    self._load_config(config)
  File "/usr/local/lib/python3.5/dist-packages/traitlets/config/configurable.py", line 168, in _load_config
    warn(msg)
  File "/usr/lib/python3.5/contextlib.py", line 66, in __exit__
    next(self.gen)
  File "/usr/local/lib/python3.5/dist-packages/traitlets/traitlets.py", line 1129, in hold_trait_notifications
    self.notify_change(change)
  File "/usr/local/lib/python3.5/dist-packages/traitlets/traitlets.py", line 1174, in notify_change
    c(change)
  File "/usr/local/lib/python3.5/dist-packages/traitlets/traitlets.py", line 702, in __call__
    self.cb(change.name, change.old, change.new)
  File "/usr/local/lib/python3.5/dist-packages/nbconvert/nbconvertapp.py", line 213, in _postprocessor_class_changed
    self.postprocessor_factory = import_item(new)
  File "/usr/local/lib/python3.5/dist-packages/ipython_genutils/importstring.py", line 35, in import_item
    raise ImportError('No module named %s' % obj)
ImportError: No module named EmbedPostProcessor
Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/ipython_genutils/importstring.py", line 33, in import_item
    pak = getattr(module, obj)
AttributeError: module 'jupyter_contrib_nbextensions.nbconvert_support' has no attribute 'EmbedPostProcessor'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/bin/jupyter-nbconvert", line 11, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.5/dist-packages/jupyter_core/application.py", line 267, in launch_instance
    return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs)
  File "/usr/local/lib/python3.5/dist-packages/traitlets/config/application.py", line 657, in launch_instance
    app.initialize(argv)
  File "<decorator-gen-7>", line 2, in initialize
  File "/usr/local/lib/python3.5/dist-packages/traitlets/config/application.py", line 87, in catch_config_error
    return method(app, *args, **kwargs)
  File "/usr/local/lib/python3.5/dist-packages/nbconvert/nbconvertapp.py", line 237, in initialize
    self.init_postprocessor()
  File "/usr/local/lib/python3.5/dist-packages/nbconvert/nbconvertapp.py", line 286, in init_postprocessor
    self.postprocessor_class)
  File "/usr/local/lib/python3.5/dist-packages/nbconvert/nbconvertapp.py", line 213, in _postprocessor_class_changed
    self.postprocessor_factory = import_item(new)
  File "/usr/local/lib/python3.5/dist-packages/ipython_genutils/importstring.py", line 35, in import_item
    raise ImportError('No module named %s' % obj)
ImportError: No module named EmbedPostProcessor

Exporting to .html through the browser interface works fine, but calling nbconvert causes this issue. Any help is much appreciated!

OS: Ubuntu 16.04 LTS
jupyter version 4.2.0
jupyter-contrib-nbextension version 0.2.0

[juhasch]

If you upgraded from an older version of the notebooks extensions, you can try
executing the command jupyter contrib nbextension migrate

Otherwise, can you try doing
import jupyter_contrib_nbextensions.nbconvert_support.post_embedhtml
in IPython?

[michaelplews]

Thanks for the quick response. Unfortunately the migrate command didn't seem to fix it.

With iPython in the terminal:

~$ ipython
Python 3.5.2 (default, Sep 10 2016, 08:21:44) 
Type "copyright", "credits" or "license" for more information.

IPython 5.1.0 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

In [1]: import jupyter_contrib_nbextensions.nbconvert_support.post_embedhtml
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-1-7b12130a4b8e> in <module>()
----> 1 import jupyter_contrib_nbextensions.nbconvert_support.post_embedhtml

ImportError: No module named 'jupyter_contrib_nbextensions.nbconvert_support.post_embedhtml'

[soedjais]

I experienced the same thing when running jupyter nbconvert --to python mynotebook.ipynb:

Traceback (most recent call last):
  File "/home/ubuntu/anaconda3/bin/jupyter-nbconvert", line 6, in <module>
    sys.exit(main())
  File "/home/ubuntu/anaconda3/lib/python3.5/site-packages/jupyter_core/application.py", line 267, in launch_instance
    return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs)
  File "/home/ubuntu/anaconda3/lib/python3.5/site-packages/traitlets/config/application.py", line 652, in launch_instance
    app.initialize(argv)
  File "<decorator-gen-7>", line 2, in initialize
  File "/home/ubuntu/anaconda3/lib/python3.5/site-packages/traitlets/config/application.py", line 87, in catch_config_error
    return method(app, *args, **kwargs)
  File "/home/ubuntu/anaconda3/lib/python3.5/site-packages/nbconvert/nbconvertapp.py", line 237, in initialize
    self.init_postprocessor()
  File "/home/ubuntu/anaconda3/lib/python3.5/site-packages/nbconvert/nbconvertapp.py", line 286, in init_postprocessor
    self.postprocessor_class)
  File "/home/ubuntu/anaconda3/lib/python3.5/site-packages/nbconvert/nbconvertapp.py", line 213, in _postprocessor_class_changed
    self.postprocessor_factory = import_item(new)
  File "/home/ubuntu/anaconda3/lib/python3.5/site-packages/ipython_genutils/importstring.py", line 35, in import_item
    raise ImportError('No module named %s' % obj)
ImportError: No module named EmbedPostProcessor

[soedjais]

I've fixed this by editing ~/.jupyter/jupyter_nbconvert_config.json
and removing this line:
"postprocessor_class": "jupyter_contrib_nbextensions.nbconvert_support.EmbedPostProcessor"

[jcb91]

I think this is a result of the rename of embed postprocessor class, we should perhaps add the rename to our migrate script, as with the renamed yapf_ext->code_prettify in #786

[jfbercher]

Yes. I also had this issue.

[ccchiang]

**Soedjais'**s way fixed this problem for me. However, if you run jupyter notebook under Windows, the configuration file jupyter_nbconvert_config.json might not be in the "user/.jupyter" directory.
Run

jupyter-nbconvert --to html yourfile.ipynb --log-level=DEBUG

to see the log and it will tell you where you can find the file that really affects the conversion. In my case, it's in "c:\ProgramData" which is an invisible system directory. This directory would not be removed even if you uninstall the Anaconda.

[jcb91]

if you run jupyter notebook under Windows, the configuration file jupyter_nbconvert_config.json might not be in the "user/.jupyter" directory

Different platforms have different jupyter directories, and even on single platform there are at least three alternatives (per-user, python sys-prefix, and system-wide). For the per-user directories on your system, use

jupyter --config-dir
jupyter --data-dir

Which does indeed give ~/.jupyter for me on Windows 8.1. However, if you've installed not in the per-user config, you'll want an exhaustive list of jupyter directories, for which you can use

jupyter --paths

As @ccchiang notes, running an nbconvert command with debug tell you which files are actually loaded. The Windows C:\ProgramData\jupyter path is the system-level jupyter directory, so presumably you made a system-wide install (i.e. no --user or --sys-prefix flags) for that to have happened.

[basnijholt]

I had to remove "postprocessor_class": "jupyter_contrib_nbextensions.nbconvert_support.EmbedPostProcessor" from the default config file in the anaconda folder to fix this issue:

cat /home/bnijholt/anaconda3/etc/jupyter/jupyter_nbconvert_config.json
{
  "NbConvertApp": {
    "postprocessor_class": "jupyter_contrib_nbextensions.nbconvert_support.EmbedPostProcessor"
  },
  "Exporter": {
    "template_path": [
      ".",
      "/home/bnijholt/anaconda3/lib/python3.5/site-packages/jupyter_contrib_nbextensions/templates"
    ],
    "preprocessors": [
      "jupyter_contrib_nbextensions.nbconvert_support.CodeFoldingPreprocessor",
      "jupyter_contrib_nbextensions.nbconvert_support.PyMarkdownPreprocessor"
    ]
  },
  "version": 1
}

[RobertoFranceschini]

If you upgraded from an older version of the notebooks extensions, you can try
executing the command jupyter contrib nbextension migrate

That was the fix for me!