[IPython-user] beginner's question

Charles Hartman charles.hartman at conncoll.edu
Thu Mar 23 10:09:05 CST 2006

That works. Thank you.

Charles Hartman

On Mar 23, 2006, at 10:50 AM, Fernando Perez wrote:

> Charles Hartman wrote:
>> I just started with IPython. (OS 10.4.5 on both PPC and Intel;   
>> MacPython 2.4.1; wxPython 2.6.) I'm having a little trouble with  
>> the  wxPython connection. Here's (I'm sure) a very simple question  
>> from a  non-Unix-savvy newbie:
>> It was not true at first, but is true now, that on my PPC  
>> PowerBook  if I start with 'ipython' all is well, but if I start  
>> with 'ipython - wthread' I get the message
>> 		This program needs access to the screen. Please run with  
>> 'pythonw',  not 'python',
>> 		and only when you are logged in on the main display of your Mac.
>> After that if I give any keypress except ann immediately ctrl-D,  
>> then  I can only quit by closing the Terminal. This doesn't happen  
>> on the  Intel machine, but since it didn't originally happen on  
>> the PPC one I  doubt that's the issue. I know that "python" and  
>> "pythonw" both point  to scripts in /usr/local/bin (as does  
>> "ipython"), but I don't know  enough to see the next step. If it  
>> matters, 'env' shows nearly  identical results on the two machines.
>> Thanks for any guidance.
> Mmh, I see there has been no reply to your question yet, so I'll  
> take a stab (though I'm not 100% sure I'm right, since I don't use  
> OSX myself).  You will probably be OK if you open /usr/local/bin/ 
> ipython and change its top line (the one starting with #!, known as  
> the 'shebang line' in unix-ese) to read
> #!/usr/bin/env pythonw
> or
> #!/usr/local/bin/pythonw
> The first one is a preferred way, since it will find pythonw  
> anywhere on your PATH, but use the second if the first fails.
> I don't know if there are any problems with using pythonw all the  
> time instead of python.  If there are, you can either make a copy  
> of the ipython start script and name it ipythonw, or make an alias  
> of the kind
> alias ipythonw 'pythonw /usr/local/bin/ipython'
> which will force ipython to be run under pythonw instead of plain  
> python.
> I hope this helps,
> f

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