Re: [Pytables-users] Francesc Alted ceasing activities with PyTables

2011-06-29 Thread Armando Serrano Lombillo
Hi Francesc, thanks for developing and maintaining PyTables all this years, good luck to you and good luck to PyTables. I hope that the strengths of opensource help this project live on. Armando. On Fri, Jun 3, 2011 at 10:18 PM, Antonio Valentino a_valent...@users.sourceforge.net wrote: Hi

Re: [Pytables-users] A Few Questions About Iterating Through PyTables

2011-06-29 Thread Josh Ayers
Here's an alternative method that uses the built-in search capabilities in PyTables in place of the itertools library. Using readWhere as shown below will return a NumPy ndarray of the data that matches the query. I think that answers your question #4. There are similar methods - where and

[Pytables-users] Windows installer for the new version.

2011-06-29 Thread Joe Paul
Hi All, Sorry if this sounds too naive. Wanted to see whether there is a windows installer with the newly created pytables (with pro) version for both 32 bit and 64 bit operating system. I did try this location but couldn't find the new version. http://www.lfd.uci.edu/~gohlke/pythonlibs/ In

Re: [Pytables-users] A Few Questions About Iterating Through PyTables

2011-06-29 Thread Geoffrey Zhu
Hi Josh, Thanks for your response. The problem of readWhere() is that it does not fully take advantage of the fact that my table is sorted and the time to iterate over it should be no greater than O(n). The strange thing is that my iter0() is really fast but all other versions are really slow.

Re: [Pytables-users] A Few Questions About Iterating Through PyTables

2011-06-29 Thread Josh Ayers
Geoffrey, I think the difference is that your iter0 function accesses the records in the order in which they appear in the table, while all the other methods sort them. If you only need to read the records associated with a single key at a time, you could take advantage of the fact that the keys

[Pytables-users] renaming a column

2011-06-29 Thread Ben Elliston
Is it possible to rename a column in an existing table? I've dug through the documentation and not been able to find anything. I'd rather not have to copy the data from the existing table into a new one, as this will require compacting -- and the database is huge. Thanks, Ben