Question on configuring notebook to not print after every cell

[dillontiner]

Is there a way to configure the notebook to not print output without having to return nil in every cell? If not, perhaps this could be implemented as a magic command: https://ipython.readthedocs.io/en/stable/interactive/magics.html

I'm working with a lot of text data and my kernel will slow or even die when I forget to add nil to the end of the cell.

[mrkn]

I have a plan to implement the display prevention which is enabled by putting ; at the end of a cell. This behavior is same as IJulia.

Please wait a moment. Or, please give me a pull-request.

[ankane]

Wanted to voice my support for this as well. Python currently won't output on assignment.

a = 1 + 2 # no output
1 + 2     # output

IRB in Ruby 2.7 was changed to have the same behavior.

a = 1 + 2 # no output
1 + 2     # output

Would be great to see this as the default, as this was the biggest thing I noticed when switching from Python notebooks.

[ankane]

I have a branch to support this once #276 is merged. The basic code is:

module IRuby
  class PlainBackend
    def eval(code, store_history)
      @irb.context.evaluate(code, 0)
      @irb.context.last_value unless assignment_expression?(code)
    end

    def assignment_expression?(code)
      @irb.respond_to?(:assignment_expression?, true) && @irb.send(:assignment_expression?, code)
    end
  end
end