Le 12/04/17 à 10:51, Peter Otten a écrit :
Vincent Vande Vyvre wrote:
Le 12/04/17 à 08:57, Vincent Vande Vyvre a écrit :
Hi,
Learning CPython, I've made this simple exercice, a module test which
contains an object Test.
The object Test has an attribute name, fixed at instanciation.
So, I try my code with a script:
-------------------------------------------
from test import Test
for n in ("The name", "Foo", "Spam"):
t = Test(n)
print("%s --> %s" %(n, t.name))
-------------------------------------------
And the return:
Uhe name --> Uhe name
Goo --> Goo
Tpam --> Tpam
As we can see, the first letter is changed with the next letter in
alphabetical order, but not only for the attribute name, also for the
reference n.
if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|", kwlist, &name))
return -1;
if (name) {
tmp = self->name;
Py_INCREF(name);
While I don't know how to do this properly you seem to be applying
Py_INCREF() to a C string rather than a Python string object. C being C you
can cast anything to anything else...
Aren't there any warnings at compile time?
No, no warning.
For the truth, this code is copy-pasted from the doc.
https://docs.python.org/3.5//extending/newtypes.html#adding-data-and-methods-to-the-basic-example
Vincent
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