[IPython-dev] IPython prompt delay

Fernando Perez Fernando.Perez at colorado.edu
Thu Dec 1 11:01:05 CST 2005


Frédéric Mantegazza wrote:
> Le Mercredi 30 Novembre 2005 19:05, Fernando Perez a écrit :
> 
> 
>>>It works, but it displays 'None' before PyMAD. It is because
>>>time.sleep() returns None, I presume. How can I make it return an empty
>>>string, instead ?
>>
>>Wrap it:
>>
>>def mysleep(t):
>>   time.sleep(t)
>>   return ''
> 
> 
> I tied that, but IPython can't find my function. Where do I have to put it 
> to be reachable by the prompt at runtime?

The prompt system executes in the global environment of the user.  The 
simplest way to define extra things is to put them in a pure python file and 
call that from your ipythonrc.  This should clarify it:

planck[~/.ipython]> cat ipythonrc-myprompt
prompt_in1 '${prompt1()} \nIn [\#]: '

execfile myprompt.py
planck[~/.ipython]> cat myprompt.py
def prompt1():
     return '<Hi Fred>'
planck[~/.ipython]> ipython -p myprompt
Python 2.3.4 (#1, Feb  2 2005, 12:11:53)
Type "copyright", "credits" or "license" for more information.

IPython 0.6.16.svn -- An enhanced Interactive Python.
?       -> Introduction to IPython's features.
%magic  -> Information about IPython's 'magic' % functions.
help    -> Python's own help system.
object? -> Details about 'object'. ?object also works, ?? prints more.

IPython profile: myprompt

<Hi Fred>
In [1]:
Do you really want to exit ([y]/n)?
planck[~/.ipython]>


> I found another solution :
> 
>     str(time.sleep(0.1))[1:0]

That will do too.

Cheers,

f




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