Ostap is a set of extensions/decorators and utilities over the basic PyROOT functionality (python wrapper for ROOT framework). These utilities greatly simplify the interactive manipulations with ROOT classes through python. The main ingredients of Ostap are

• preconfigured ipython script ostap, that can be invoked from the command line.
• decoration of the basic ROOT objects, like histograms, graphs etc.
  • operations and operators
  • iteration, element access, etc
  • extended functionality
• decoration of many basic ROOT.RooFit objects
• set of new useful fit models, components and operations
• other useful analysis utilities