The Python language is easily extensible with C and C++ code. This enables Python applications to access legacy algorithms, specialized hardware, and to perform highly specialized computing.

C/C++ Python extensions enable developers to "glue" together different parts of a program, creating a mixed language application. Understanding and debugging the interdependencies and data exchange between language barriers in a mixed language application is a real challenge for developers.

TotalView supports debugging Python extensions, shows a clean set of stack frames across the language barriers, and allows both Python and C/C++ variables to be examined and compared.

The debugger does not yet support setting breakpoints and stepping actual Python code as it does with C and C++, but it excels at making it easy to set up your debug session, examine the data exchange between the language barriers, and debug your C/C++ code.