How can we access a module written in Python from C?
Interviewer Expectations for this Question
01
Core Competency
Assesses fundamental understanding of Python conventions, runtime behavior, and memory/performance considerations.
02
Evaluation Criteria
Hiring managers look for precision, avoidance of ambiguous jargon, and ability to explain trade-offs under real production conditions.
Comprehensive Model Answer
Verified Solution
Python modules can be imported and executed from C/C++ applications via the official Python C API (#include <Python.h>):
#include <Python.h>
void run_python_logic() {
Py_Initialize();
// Import the module
PyObject *pModule = PyImport_ImportModule("my_module");
if (pModule != NULL) {
// Retrieve and execute function
PyObject *pFunc = PyObject_GetAttrString(pModule, "my_function");
if (pFunc && PyCallable_Check(pFunc)) {
PyObject *pValue = PyObject_CallNoArgs(pFunc);
Py_XDECREF(pValue);
}
Py_XDECREF(pFunc);
Py_DECREF(pModule);
}
Py_Finalize();
}
Candidate Response Strategy & Interview Tips
- Start with a concise one-sentence summary: Deliver a direct, confident answer first before expanding into nuances.
- Demonstrate real-world trade-offs: Discuss where this approach excels and when you would avoid it in production systems.
- Discuss complexity & edge cases: Proactively explain time/space complexity or boundary conditions (null values, scale limits).
- Prepare for interviewer follow-ups: Technical hiring panels frequently probe deeper into concurrency, backward compatibility, or alternative libraries.