With the Python session set up and a breakpoint set in the Python extension, start running the Python interpreter by clicking Go (). TotalView stops when your breakpoint is hit.
Figure 86, Stopped at Python extension function and clean integrated call stack
Note the Call Stack in Figure 86 that displays both C and Python code.
This view has been transformed to hide function calls that just facilitate Python and C/C++ working together. See Transforming the Stack for how this works.