  AlphaTwirl is a Python library that summarizes large event data into
multivariate categorical data, which can be regarded as generalizations of
histograms. The output can be imported as data frames in R and pandas. With
their rich set of data wrangling tools, users can develop flexible and
configurable analysis code. The multivariate categorical data loaded as data
frames are readily visualized by graphic tools available in R and Python.
AlphaTwirl can process event data concurrently with multiple cores or batch
systems. Users can extend and customize nearly any functionality of AlphaTwirl
with reusable code. AlphaTwirl is released under the BSD license.
