Re: [Numpy-discussion] Change to get_printoptions?

2007-07-26 Thread Travis Oliphant
Zachary Pincus wrote:
 Hello all,
 
 I just recently updated to the SVN version of numpy to test my code  
 against it, and found that a small change made to  
 numpy.get_printoptions (it now returns a dictionary instead of a  
 list) breaks my code.
 
 Here's the changeset:
 http://projects.scipy.org/scipy/numpy/changeset/3877
 
 I'm not really looking forward to needing to detect numpy versions  
 just so I can do the right thing with get_printoptions, but I do  
 agree that the new version of the function is more sensible. My  
 question is if there's any particular policy about backwards- 
 incompatible python api changes, or if I need to be aware of their  
 possibility at every point release. (Either is fine -- I'm happy for  
 numpy to be better at the cost of incompatibility, but I'd like to  
 know if changes like these are the rule or exception.)

At this point, changes like you experienced should be the exception. 
But, occasionally they will happen.  We really try to document them when 
they occur but this relies on those of us who make the changes making 
adequate note about them.

When the version jumps to 1.1, then there may be more incompatibilities 
but they should be documented.

Thanks for the note and the reminder.

-Travis
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[Numpy-discussion] Change to get_printoptions?

2007-07-25 Thread Zachary Pincus
Hello all,

I just recently updated to the SVN version of numpy to test my code  
against it, and found that a small change made to  
numpy.get_printoptions (it now returns a dictionary instead of a  
list) breaks my code.

Here's the changeset:
http://projects.scipy.org/scipy/numpy/changeset/3877

I'm not really looking forward to needing to detect numpy versions  
just so I can do the right thing with get_printoptions, but I do  
agree that the new version of the function is more sensible. My  
question is if there's any particular policy about backwards- 
incompatible python api changes, or if I need to be aware of their  
possibility at every point release. (Either is fine -- I'm happy for  
numpy to be better at the cost of incompatibility, but I'd like to  
know if changes like these are the rule or exception.)

Also, in terms of compatibility checking, has anyone written a little  
function to check if numpy is within a particular version range?  
Specifically, one that handles numpy's built from SVN as well as from  
release tarballs.


Thanks,

Zach Pincus

Program in Biomedical Informatics and Department of Biochemistry
Stanford University School of Medicine

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