 | Check that import_array() is called if the NumPy C API is in use! |
| ImportError suggests wrong module initialization or missing required/user functions |
| You need experience to track down errors in the C code |
| An error in one place often shows up as an error in another place (especially indexing out of bounds or wrong memory handling) |
| Use a debugger (gdb) and print statements in the C code and the calling script |
| C++ modules are (almost) as error-prone as C modules |
