Notebook: Warning messages on command line about extensions, mac, anaconda3

[mmngreco]

When I run jupyter notebook see some warnings messages on terminal about extensions. This require some action from me like remove one of both directories? This start when I created a new env.

Here the warnings:

[W 10:42:35.766 NotebookApp] nbextension 'autosavetime/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/autosavetime/autosavetime.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/autosavetime/autosavetime.yaml'
[W 10:42:35.769 NotebookApp] nbextension 'autoscroll/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/autoscroll/autoscroll.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/autoscroll/autoscroll.yaml'
[W 10:42:35.770 NotebookApp] nbextension 'chrome-clipboard/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/chrome-clipboard/chrome-clipboard.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/chrome-clipboard/chrome-clipboard.yaml'
[W 10:42:35.772 NotebookApp] nbextension 'code_font_size/code_font_size' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/code_font_size/code_font_size.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/code_font_size/code_font_size.yaml'
[W 10:42:35.774 NotebookApp] nbextension 'code_prettify/code_prettify' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/code_prettify/code_prettify.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/code_prettify/code_prettify.yaml'
[W 10:42:35.777 NotebookApp] nbextension 'codefolding/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/codefolding/codefolding.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/codefolding/codefolding.yaml'
[W 10:42:35.781 NotebookApp] nbextension 'collapsible_headings/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/collapsible_headings/collapsible_headings.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/collapsible_headings/collapsible_headings.yaml'
[W 10:42:35.783 NotebookApp] nbextension 'comment-uncomment/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/comment-uncomment/comment-uncomment.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/comment-uncomment/comment-uncomment.yaml'
[W 10:42:35.784 NotebookApp] nbextension 'contrib_nbextensions_help_item/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/contrib_nbextensions_help_item/contrib_nbextensions_help_item.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/contrib_nbextensions_help_item/contrib_nbextensions_help_item.yaml'
[W 10:42:35.786 NotebookApp] nbextension 'datestamper/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/datestamper/main.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/datestamper/main.yaml'
[W 10:42:35.787 NotebookApp] nbextension 'dragdrop/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/dragdrop/dragdrop.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/dragdrop/dragdrop.yaml'
[W 10:42:35.788 NotebookApp] nbextension 'equation-numbering/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/equation-numbering/info.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/equation-numbering/info.yaml'
[W 10:42:35.789 NotebookApp] nbextension 'execute_time/ExecuteTime' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/execute_time/ExecuteTime.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/execute_time/ExecuteTime.yaml'
[W 10:42:35.791 NotebookApp] nbextension 'exercise/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/exercise/exercise.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/exercise/exercise.yaml'
[W 10:42:35.793 NotebookApp] nbextension 'exercise2/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/exercise2/exercise2.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/exercise2/exercise2.yaml'
[W 10:42:35.794 NotebookApp] nbextension 'freeze/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/freeze/config.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/freeze/config.yaml'
[W 10:42:35.796 NotebookApp] nbextension 'gist_it/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/gist_it/gist_it.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/gist_it/gist_it.yaml'
[W 10:42:35.798 NotebookApp] nbextension 'help_panel/help_panel' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/help_panel/help_panel.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/help_panel/help_panel.yaml'
[W 10:42:35.800 NotebookApp] nbextension 'hide_input/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/hide_input/hide-input.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/hide_input/hide-input.yaml'
[W 10:42:35.802 NotebookApp] nbextension 'hide_input_all/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/hide_input_all/hide_input_all.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/hide_input_all/hide_input_all.yaml'
[W 10:42:35.803 NotebookApp] nbextension 'highlighter/highlighter' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/highlighter/highlighter.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/highlighter/highlighter.yaml'
[W 10:42:35.804 NotebookApp] nbextension 'hinterland/hinterland' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/hinterland/hinterland.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/hinterland/hinterland.yaml'
[W 10:42:35.805 NotebookApp] nbextension 'init_cell/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/init_cell/init_cell.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/init_cell/init_cell.yaml'
[W 10:42:35.807 NotebookApp] nbextension 'keyboard_shortcut_editor/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/keyboard_shortcut_editor/keyboard_shortcut_editor.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/keyboard_shortcut_editor/keyboard_shortcut_editor.yaml'
[W 10:42:35.809 NotebookApp] nbextension 'latex_envs/latex_envs' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/latex_envs/latex_envs.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/latex_envs/latex_envs.yaml'
[W 10:42:35.810 NotebookApp] nbextension 'limit_output/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/limit_output/limit-output.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/limit_output/limit-output.yaml'
[W 10:42:35.812 NotebookApp] nbextension 'move_selected_cells/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/move_selected_cells/move_selected_cells.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/move_selected_cells/move_selected_cells.yaml'
[W 10:42:35.813 NotebookApp] nbextension 'navigation-hotkeys/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/navigation-hotkeys/hotkeys.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/navigation-hotkeys/hotkeys.yaml'
[W 10:42:35.815 NotebookApp] nbextension 'notify/notify' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/notify/notify.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/notify/notify.yaml'
[W 10:42:35.816 NotebookApp] nbextension 'printview/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/printview/printview.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/printview/printview.yaml'
[W 10:42:35.818 NotebookApp] nbextension 'python-markdown/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/python-markdown/python-markdown.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/python-markdown/python-markdown.yaml'
[W 10:42:35.819 NotebookApp] nbextension 'qtconsole/qtconsole' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/qtconsole/qtconsole.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/qtconsole/qtconsole.yaml'
[W 10:42:35.820 NotebookApp] nbextension 'rubberband/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/rubberband/rubberband.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/rubberband/rubberband.yaml'
[W 10:42:35.821 NotebookApp] nbextension 'ruler/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/ruler/ruler.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/ruler/ruler.yaml'
[W 10:42:35.823 NotebookApp] nbextension 'runtools/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/runtools/runtools.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/runtools/runtools.yaml'
[W 10:42:35.824 NotebookApp] nbextension 'scratchpad/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/scratchpad/scratchpad.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/scratchpad/scratchpad.yaml'
[W 10:42:35.825 NotebookApp] nbextension 'search-replace/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/search-replace/search-replace.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/search-replace/search-replace.yaml'
[W 10:42:35.827 NotebookApp] nbextension 'select_keymap/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/select_keymap/select_keymap.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/select_keymap/select_keymap.yaml'
[W 10:42:35.828 NotebookApp] nbextension 'skill/skill' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/skill/skill.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/skill/skill.yaml'
[W 10:42:35.829 NotebookApp] nbextension 'skip-traceback/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/skip-traceback/skip-traceback.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/skip-traceback/skip-traceback.yaml'
[W 10:42:35.832 NotebookApp] nbextension 'spellchecker/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/spellchecker/config.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/spellchecker/config.yaml'
[W 10:42:35.833 NotebookApp] nbextension 'splitcell/splitcell' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/splitcell/splitcell.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/splitcell/splitcell.yaml'
[W 10:42:35.835 NotebookApp] nbextension 'table_beautifier/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/table_beautifier/table_beautifier.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/table_beautifier/table_beautifier.yaml'
[W 10:42:35.837 NotebookApp] nbextension 'toc2/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/toc2/toc2.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/toc2/toc2.yaml'
[W 10:42:35.839 NotebookApp] nbextension 'toggle_all_line_numbers/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/toggle_all_line_numbers/main.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/toggle_all_line_numbers/main.yaml'
[W 10:42:35.840 NotebookApp] nbextension 'tree-filter/index' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/tree-filter/tree-filter.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/tree-filter/tree-filter.yaml'
[W 10:42:35.842 NotebookApp] nbextension 'zenmode/main' has duplicate listings in both '/Users/mmngreco/anaconda3/share/jupyter/nbextensions/zenmode/zenmode.yaml' and '/Users/mmngreco/Library/Jupyter/nbextensions/zenmode/zenmode.yaml'

[jcb91]

These warnings are generated by the jupyter_nbextensions_configurator (see jupyter_nbextensions_configurator/__init__.py#L105-L110), rather than notebook proper (perhaps there should be a logging prefix to reflect this?), and it looks like the issue is caused by an install of jupyter_contrib_nbextensions in two distinct locations. Essentially, it seems like you've got one set installed at the sys.prefix location ~/anaconda3/share/jupyter, and another set at the OSX per-user location ~/Library/Jupyter. I suspect you could fix this by running

jupyter contrib nbextension uninstall --user

[mmngreco]

Thanks for you answer @jcb91, I understand, I tried your solution and it worked well, so thanks for your time.

[jcb91]

You're welcome, glad you got it sorted ok!