  Many numerical simulation tools have been developed and are on the market,
but there is still a strong need for appropriate tools capable of simulating
multi-field problems, especially in aeroacoustics. Therefore, openCFS provides
an open-source framework for implementing partial differential equations using
the finite element method. Since 2000, the software has been developed
continuously. The result is openCFS (before 2020, known as CFS++ Coupled Field
Simulations written in C++). In this paper, we present pyCFS-data, a data
processing framework written in Python to provide a flexible and easy-to-use
toolbox to access and manipulate, pre- and postprocess data generated by or for
usage with openCFS.
