Jupyter: Add extra_data_list option to support display data similar to the...

Jupyter: Add extra_data_list option to support display data similar to the original jupyter python backend.

software/ipython_notebook/software.cfg

@@ -43,7 +43,7 @@ md5sum = d7d4a7e19d55bf14007819258bf42100
 [erp5-kernel]
 <= download-file-base
 filename = ERP5kernel.py.jinja
-md5sum = a0d13f4f5a9cd22a7b5d2c901aa9faae
+md5sum = b3737a0e753055cc2f9ccd9610d0e2bb
 
 [kernel-json]
 <= download-file-base

software/ipython_notebook/template/ERP5kernel.py.jinja

@@ -214,6 +214,8 @@ class ERP5Kernel(Kernel):
       # Remove spaces and newlines from both ends of code
       code = code.strip()
 
+      extra_data_list = []
+
       if code.startswith('%'):
           # No need to try-catch here as its already been taken that the code
           # starts-with '%', so we'll get magic_name, no matter what be after '%'
@@ -279,6 +281,8 @@ class ERP5Kernel(Kernel):
               # Required in case the mime_type is anything other than 'text/plain'
               mime_type = content['mime_type']
 
+              extra_data_list = content.get('extra_data_list', [])
+
             # Display to frontend the error message for content status as 'error'
               if content['status']=='error':
                 reply_content = {
@@ -309,6 +313,9 @@ class ERP5Kernel(Kernel):
           'metadata': {}}
         self.send_response(self.iopub_socket, 'display_data', data)
 
+        for extra_data in extra_data_list:
+          self.send_response(self.iopub_socket, 'display_data', extra_data)
+
     reply_content = {
       'status': status,
       # The base class increments the execution count

stack/erp5/buildout.cfg

@@ -566,6 +566,9 @@ eggs = ${neoppod:eggs}
 # Needed for parsing .po files from our Localizer subset
   polib
 
+# Used by ERP5 Jupyter backend
+  ipykernel
+
 # parameterizing the version of the generated python interpreter name by the
 # python section version causes dependency between this egg section and the
 # installation of python, which we don't want on an instance