Hello,
This statement 'I wish to import a .stp geometry file into pyfluent' is in itself not appropriate. It is important to note that PyFluent, or PyAnsys, is not a standalone tool but rather a Python interface for interacting with Ansys products. It primarily facilitates communication with Ansys products in a Pythonic manner. However, for meshing, solving and post-processing, you have the APIs to interface with the Ansys Fluent session. But as a starting point, you would typically need to prepare the CAD separately and have it ready to be imported in Fluent meshing, via PyFluent interfacing.
You are navigating away from the AIS Discovery experience