Where I write.

scikit-learn: init your estimator lightly and fit heavily

scipy: pdist indexing

scikit-learn: A walk through of GroupKFold.split()

Pandas: split a DataFrame into chunks

Check the header of Columbia Eigen tab delimited files

R: Graphics Tricks

SQL: Autocommit does not guarantee immediate committing

Python: pprint.pformat can be a good friend of __str__

Digest of Essential SQLAlchemy

Python: Use datatime instead of time for local clocks