Pass a list as an argument to a Python C module?

Question

I found this good Python C module example, where a single integer is passed as a single argument. How can I pass the python list as an argument instead?

Answer 1

From http://code.activestate.com/lists/python-list/31841/ :

... char * tok; /* delimiter tokens for strtok */ int cols; /* number of cols to parse, from the left */ int numLines; /* how many lines we passed for parsing */ char * line; /* pointer to the line as a string */ char * token; /* token parsed by strtok */ PyObject * listObj; /* the list of strings */ PyObject * strObj; /* one string in the list */ /* the O! parses for a Python object (listObj) checked to be of type PyList_Type */ if (! PyArg_ParseTuple( args, "O!is", &PyList_Type, &listObj, &cols, &tok )) return NULL; /* get the number of lines passed to us */ numLines = PyList_Size(listObj); /* should raise an error here. */ if (numLines < 0) return NULL; /* Not a list */ 

...

 /* iterate over items of the list, grabbing strings, and parsing for numbers */ for (i=0; i<numLines; i++){ /* grab the string object from the next element of the list */ strObj = PyList_GetItem(listObj, i); /* Can't fail */ /* make it a string */ line = PyString_AsString( strObj ); /* now do the parsing */ 

See parsing arguments and build values.

Answer 2

Use one of the O arguments and the protocol sequence .