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----
-title: "Getting the .ipynb Notebook File Location From a Running Jupyter Lab Notebook"
-date: 2025-06-29T23:42:00+01:00
-summary: >
-    If you need to get the path of the ipynb file in a running #Jupyter notebook, this one-liner will do the trick. It
-    seems chatgpt is confused, and a bunch of other approaches on the web look fragile and/or unnecessarily complex to
-    me.
----
-
-If you need to get the path of the ipynb file in a running #Jupyter notebook, this one-liner will do the trick. It seems
-chatgpt is confused, and a bunch of other approaches on the web look fragile and/or unnecessarily complex to me.
-
-.. code:: python
-
-    import sys
-    Path(json.loads(Path(sys.argv[-1]).read_bytes())['jupyter_session'])
-
-The way this works is that for each notebook, jupyter starts a python "kernel" process that actually runs the notebook's
-code. That kernel gets a json file with info on the notebook's location on the disk passed through its command line.
-Since we're running code in that exact python process, we can just grab that json file from sys.argv, and read it
-ourselves.