Temporarily Disable History Logging

[jdtsmith]

I'm working to improve Emacs interaction with iPython. Emacs sends many commands to iPython "behind the scenes", hiding the output. This causes iPython to update the history execution counter, and also pollutes In (and _, _2, etc.).

Is there a way to ask iPython to run a command but not record it in In/Out or update the execution counter (i.e. "off the books")?

This "sort of" works but leads to an error:

In [9]: _ip.execution_count -= 1; print('OK?')
OK?

ERROR! Session/line number was not unique in database. History logging moved to new session 483
In [9]: 

[jdtsmith]

Here's what I came up with reading the source (not sure if it's kosher but works):

class __ipb_run:
    def __init__(self):
        self.ip=get_ipython()
        self.hm=self.ip.history_manager
    def run_and_erase_tracks(self,command):
        exec(command)
        self.ip.execution_count-=1
        del self.hm.input_hist_parsed[-1]
        del self.hm.input_hist_raw[-1]
        self.hm.db_input_cache.clear()
__ipb_runner=__ipb_run()

and using it:

In [50]: __ipb_runner.run_and_erase_tracks("print('supertopsecret')")
supertopsecret

In [50]: x=5; x
Out[50]: 5

In [51]: _50
Out[51]: 5