OK, I found a solution:
%%javascript
var nb = Jupyter.notebook;
var port = window.location.port;
nb.kernel.execute("NB_Port = '" + port + "'");
The above code will put the port (in string form) into the IPython variable
NB_Port. I can then use it to build the correct URL to get the path to the
current notebook, like this:
# Get file path of this notebook
connection_file_path = kernel.get_connection_file()
connection_file = os.path.basename(connection_file_path)
kernel_id = connection_file.split('-', 1)[1].split('.')[0]
sessions = json.load(urllib2.urlopen('http://127.0.0.1:'+NB_Port+
'/api/sessions'))
for sess in sessions:
if sess['kernel']['id'] == kernel_id:
nb_rel_path = (sess['notebook']['path'])
break
res = !echo ~
nb_path = os.path.join(res[0],nb_rel_path)
nb_path
nb_dir,nb_filename = os.path.split(nb_path)
This now works even as I have two Jupyter notebook sessions open, one
running Python 2.7 and one Python 3.6.Thanks to Johannes for showing me
this method.
Now, if I could find a way that works on Windows as well....
It's a shame that we have to do this.
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