[IPython-dev] Template cells
Sat Dec 15 14:59:55 CST 2012
On 12/15/12 1:41 PM, Brian Granger wrote:
> I am aware of this implementation. I just want to avoid the round
> tripping for Markdown. We would loose an incredible amount of
> is more than capable of handling all of our need in this area.
We could emphasize the utility of no round-tripping for markdown by
having a live preview, which in general is incredibly convenient for
double-checking the output is what you intend.
On another of Thomas's points:
> - To render the cell, it is sent to the kernel as an execution request.
I'm not sure if you meant we should form a valid execute request, but I
think we should definitely *not* construct a string which is an execute
request (i.e., we should not be constructing python code in the
browser). If we need the server to execute some code in a special way,
there should be a message type or metadata indicating this, with the
string, rather than trying to construct a python execute request. In
other words, we should not be doing something like:
s = 'HTML(template.render('+escape(code)+')';
A "template cell" is really a special case of an interactive widget. I
agree with Brian that we should examine this and some other ideas about
getting/setting variable values (e.g., interactive widgets). For
example, I can imagine a render of a template cell knowing a few code
expressions that it needs, and shipping those independently to the
notebook for evaluation, then plugging in the results itself. In fact,
it could easily be arranged to have the IPython kernel push updates to
the cell if IPython noticed that one of the variables changed values, so
you'd get realtime updates.
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