将列表作为参数传递给 Python C 模块?
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【中文标题】将列表作为参数传递给 Python C 模块?【英文标题】:Pass list as argument to Python C module? 【发布时间】:2011-03-16 06:39:39 【问题描述】:我找到了this Python C 模块的好例子,其中一个整数作为唯一的参数传递。我怎样才能将 python 列表作为参数传递?
【问题讨论】:
【参考方案1】:来自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 */
见Parsing arguments and building values
【讨论】:
cols
和 tok
是干什么用的?
numLines < 0
检查真的有必要吗?【参考方案2】:
使用O
arguments 和sequence protocol 之一。
【讨论】:
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