fix #1014 and #1015 - reload on magic and fix print on python2

Author: jfbercher

src/jupyter_contrib_nbextensions/nbextensions/varInspector/README.md

@@ -25,13 +25,12 @@ The initial configuration can be given using the IPython-contrib nbextensions fa
 
 ## Notes
 - The displayed size of variables use the `getsizeof()` python method. This method doesn't work for all types, so the reported size is to be considered with some caution. The extension includes some code to correctly return the size of numpy arrays, pandas Series and DataFrame but the size for some other types may be incorrect. 
-- The extension builds on some
-  [example code](https://github.com/jupyter-widgets/ipywidgets/blob/ffa094e061c899292036049b00ff93e46e8b4691/docs/source/examples/Variable%20Inspector.ipynb)
-  provided by the ipywidgets package (essentially the `_fill` method).
+- The extension builds on some code provided [here](https://github.com/ipython/ipywidgets/blob/master/docs/source/examples/Variable%20Inspector.ipynb)  (essentially the `_fill` method)
 - The extension uses Christian Bach's [table sorter jquery plugin](https://github.com/christianbach/tablesorter). License file is included. 
 
 
 ## History
 
 - @jfbercher march 22, 2017 -- initial release
-- @jfbercher april 03, 2017 -- multiple kernel support. added support for R kernels.
+- @jfbercher april 03, 2017 -- multiple kernel support. added support for R kernels.
+- @jfbercher june 30, 2017 -- fixed #1014 (use of `%reset` with IPython kernel) and #1015 printing with python 2 kernel.

src/jupyter_contrib_nbextensions/nbextensions/varInspector/main.js

@@ -144,7 +144,9 @@ function html_table(jsonVars) {
 
     function code_exec_callback(msg) {
         var jsonVars = msg.content['text'];
-        $('#varInspector').html(html_table(jsonVars))
+        if (jsonVars == undefined) varInspector_init() 
+        //means that msg.text is undefined, that is var_dic_list was cleared ==> need to retart the enxtesnion
+        else $('#varInspector').html(html_table(jsonVars))
 
         require(['nbextensions/varInspector/jquery.tablesorter.min'],
             function() {

src/jupyter_contrib_nbextensions/nbextensions/varInspector/var_list.py

@@ -1,11 +1,7 @@
-from __future__ import print_function
-
-import json
 from sys import getsizeof
-
-from IPython import get_ipython
 from IPython.core.magics.namespace import NamespaceMagics
-
+from IPython import get_ipython
+import json
 _nms = NamespaceMagics()
 _Jupyter = get_ipython()
 _nms.shell = _Jupyter.kernel.shell
@@ -24,7 +20,7 @@ def _getsizeof(x):
 
 def var_dic_list():
     types_to_exclude = ['module', 'function', 'builtin_function_or_method',
-                        'instance', '_Feature']
+                        'instance', '_Feature', 'type', 'ufunc']
     values = _nms.who_ls()
     vardic = [{'varName': v, 'varType': type(eval(v)).__name__, 'varSize': _getsizeof(eval(v)), 'varContent': str(eval(v))[:200]} # noqa
     for v in values if (v not in ['_html', '_nms', 'NamespaceMagics', '_Jupyter']) & (type(eval(v)).__name__ not in types_to_exclude)] # noqa