When investigating calling conventions, I took a special look at
METH_OLDARGS occurrences. While most of them look reasonable,
file.writelines caught my attention. It has
if (args == NULL || !PySequence_Check(args)) {
PyErr_SetString(PyExc_TypeError,
"writelines() argument must be a sequence of strings");
return NULL;
}
Because it is a METH_OLDARGS method, you can do
f=open("/tmp/x","w")
f.writelines("foo\n","bar\n")
With my upcoming patches, I'd replace this with METH_O, making this
call illegal. Does anybody see a problem with that change in
semantics?
Regards,
Martin
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