polish it

Author: maartenbreddels

README.md

@@ -74,4 +74,8 @@ jupyter nbextension install --py --symlink --sys-prefix pythreejs
 # To clean out generated files, run:
 npm run clean
 
+# To symlink the jupyter lab extension
+jupyter labextension develop .. --overwrite
+
+
 ```

js/scripts/templates/py_top_level_init.mustache

@@ -8,6 +8,25 @@ from __future__ import absolute_import
 from {{ module.pyRelativePath }} import *
 {{/each}}
 
+
+def _prefix():
+    import sys
+    from pathlib import Path
+    prefix = sys.prefix
+    here = Path(__file__).parent
+    # for when in dev mode
+    if (here.parent / 'setup.py').exists():
+        prefix = here.parent
+    return prefix
+
+
+def _jupyter_labextension_paths():
+    return [{
+        'src': f'{_prefix()}/share/jupyter/labextensions/{npm_pkg_name}/',
+        'dest': f'{npm_pkg_name}',
+    }]
+
+
 def _jupyter_nbextension_paths():
     return [{
         'section': 'notebook',

setup.py

@@ -16,9 +16,11 @@
 from setuptools import setup
 
 
-log.set_verbosity(log.DEBUG)
-log.info('setup.py entered')
-log.info('$PATH=%s' % os.environ['PATH'])
+# due to https://github.com/jupyterlab/jupyterlab/blob/136d2ec216ebfc429a696e6ee75fee5f8ead73e2/jupyterlab/federated_labextensions.py#L347
+# we should not print out anything, otherwise setup.py --name gives noise
+# log.set_verbosity(log.DEBUG)
+# log.info('setup.py entered')
+# log.info('$PATH=%s' % os.environ['PATH'])
 
 LONG_DESCRIPTION = 'A Python/ThreeJS bridge utilizing the Jupyter widget infrastructure.'