The core of CutiePie is based on the Python/C API to extend the Python interpreter with new modules written in C/C++. These modules can not only define new functions but also new object types and their methods. To simplify the process, SIP has been chosen. SIP is a collection of tools that makes it very easy to create Python bindings for C and C++ libraries. It comprises a set of build tools and a sip module. The build tools process a set of specification files and generates C or C++ code which is then compiled to create the bindings extension module. Several extension modules may be installed in the same Python package. Extension modules can be built so that they are independent of the version of Python being used. With parts of SpecTcl converted to Python modules, the only part left to take care is the GUI. Qt is set of cross-platform C++ libraries that implement high-level APIs for accessing many aspects of modern desktop and mobile systems. PyQt5 is a comprehensive set of Python bindings for Qt v5 and allows the creation of GUI widgets, classes for accessing SQL databases, XML parser, SVG support. PyQt5 is a good example of modern technology, with known commercial applications, that improves the SpecTcl histogram visualization and offers multiple hooks to a variety of data analysis tools.