[Numpy-discussion] Possible roadmap addendum: building better text file readers

Travis Oliphant travis@continuum...
Thu Feb 23 14:08:52 CST 2012


This is actually on my short-list as well --- it just didn't make it to the list. 

In fact, we have someone starting work on it this week.  It is his first project so it will take him a little time to get up to speed on it, but he will contact Wes and work with him and report progress to this list. 

Integration with np.loadtxt is a high-priority.  I think loadtxt is now the 3rd or 4th "text-reading" interface I've seen in NumPy.  I have no interest in making a new one if we can avoid it.   But, we do need to make it faster with less memory overhead for simple cases like Wes describes.

-Travis



On Feb 23, 2012, at 1:53 PM, Pauli Virtanen wrote:

> Hi,
> 
> 23.02.2012 20:32, Wes McKinney kirjoitti:
> [clip]
>> To be clear: I'm going to do this eventually whether or not it
>> happens in NumPy because it's an existing problem for heavy
>> pandas users. I see no reason why the code can't emit structured
>> arrays, too, so we might as well have a common library component
>> that I can use in pandas and specialize to the DataFrame internal
>> structure.
> 
> If you do this, one useful aim could be to design the code such that it
> can be used in loadtxt, at least as a fast path for common cases. I'd
> really like to avoid increasing the number of APIs for text file loading.
> 
> -- 
> Pauli Virtanen
> 
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