New submission from coder.maliubiao:
code:
int
PyTuple_SetItem(register PyObject *op, register Py_ssize_t i, PyObject *newitem)
{
register PyObject *olditem;
register PyObject **p;
if (!PyTuple_Check(op) || op->ob_refcnt != 1) {
Py_XDECREF(newitem);
PyErr_BadInternalCall();
return -1;
}
if (i < 0 || i >= Py_SIZE(op)) {
Py_XDECREF(newitem);
PyErr_SetString(PyExc_IndexError,
"tuple assignment index out of range");
return -1;
}
p = ((PyTupleObject *)op) -> ob_item + i;
olditem = *p;
*p = newitem;
Py_XDECREF(olditem);
return 0;
}
olditem is not useful.
----------
components: Devguide
messages: 213730
nosy: ezio.melotti, [email protected]
priority: normal
severity: normal
status: open
title: why save the item to be replaced as olditem in PyTuple_SetItem? It's
not useful at all.
versions: Python 2.7
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Python tracker <[email protected]>
<http://bugs.python.org/issue20945>
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