¡@

Home 

python Programming Glossary: hdfstore

Selecting columns from pandas.HDFStore table

http://stackoverflow.com/questions/13926089/selecting-columns-from-pandas-hdfstore-table

columns from pandas.HDFStore table How can I retrieve specific columns from a pandas HDFStore.. table How can I retrieve specific columns from a pandas HDFStore I regularly work with very large data sets that are too big.. to read in a csv file iteratively append each chunk into HDFStore object and then work with subsets of the data. I have read in..

“Large data” work flows using pandas

http://stackoverflow.com/questions/14262433/large-data-work-flows-using-pandas

enough to fit on a hard drive. My first thought is to use HDFStore to hold large datasets on disk and pull only the pieces I need.. numpy as np import pandas as pd # create a store store pd.HDFStore 'mystore.h5' # this is the key to your storage # this maps your..

merging two tables with millions of rows in python

http://stackoverflow.com/questions/14614512/merging-two-tables-with-millions-of-rows-in-python

pandas docs stable io.html#multiple table queries A HDFStore 'A.h5' B HDFStore 'B.h5' nrows_a A.get_storer 'df' .nrows nrows_b.. stable io.html#multiple table queries A HDFStore 'A.h5' B HDFStore 'B.h5' nrows_a A.get_storer 'df' .nrows nrows_b B.get_storer..

How to trouble-shoot HDFStore Exception: cannot find the correct atom type

http://stackoverflow.com/questions/15488809/how-to-trouble-shoot-hdfstore-exception-cannot-find-the-correct-atom-type

to trouble shoot HDFStore Exception cannot find the correct atom type I am looking for.. discussions and come up with no solution to the debugging HDFStore Exception cannot find the correct atom type . I am reading in.. 6 object 45 Code to store the dataframe In 30 store pd.HDFStore 'test0.h5' 'w' In 31 for chunk in pd.read_csv 'Train.csv' chunksize..

HDF5 and SQLite. Concurrency, compression & I/O performance [closed]

http://stackoverflow.com/questions/16628329/hdf5-and-sqlite-concurrency-compression-i-o-performance

HDF5 can offer vastly better performance. Storing in an HDFStore as a single array float data compressed in other words not storing.. look at this for some detailed comparsions which is what HDFStore uses under the hood . http www.pytables.org moin here's a nice..