Amaury Forgeot d'Arc <[EMAIL PROTECTED]> added the comment:

Not bad! some remarks though:
- It's better to avoid the "expensive" call to PyErr_Occurred() when
possible. Here, an exception is set if (and only if) len==-1.
For example, it is enough to add these lines after the "__len__() should
return >= 0" message:

+               else if (PyErr_ExceptionMatches(PyExc_TypeError))
+                       PyErr_SetString(PyExc_TypeError, 
+                                       "__len__() should return an int");

- Please clarify (that is: add tests for) the case where __len__ returns
1<<50 or -1<<50. If I remember correctly, PyNumber_AsSsize_t(res, NULL)
clips the values to MAXINT. Is this wanted?

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Python tracker <[EMAIL PROTECTED]>
<http://bugs.python.org/issue3729>
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