Use resource string to get graphWidgets.js

Author: theengineear

plotly/widgets/graph_widget.py

@@ -9,14 +9,15 @@
 from IPython.display import Javascript, display
 
 from plotly import utils
+from pkg_resources import resource_string
 
 # Load JS widget code
 # No officially recommended way to do this in any other way
 # http://mail.scipy.org/pipermail/ipython-dev/2014-April/013835.html
 directory = os.path.dirname(os.path.realpath(__file__))
 js_widget_file = os.path.join(directory, 'graphWidget.js')
-with open(js_widget_file) as f:
-    js_widget_code = f.read()
+js_widget_code = resource_string('plotly',
+                                 'widgets/graphWidgets.js').decode('utf-8')
 
 display(Javascript(js_widget_code))