 | Suppose we have a C function
extern double hw1(double r1, double r2); |
| We want to call this from Python as
from hw import hw1 r1 = 1.2; r2 = -1.2 s = hw1(r1, r2) |
| The Python variables r1 and r2 hold numbers (float), we need to extract these in the C code, convert to double variables, then call hw1, and finally convert the double result to a Python float |
| All this conversion is done in wrapper code |
