A modest Error (I mean Proposal)

[Arinte]

You'll have to excuse me because, I am a newbie to python and I don't do a
lot of doc reading.

This is a embedded python project, lots of calls back and forth from c++ to
python.  How do you know when to call PyErr_Clear?  Do I call it when I do a
rets = PyLong_AsLong(comm);
when comm is suppose to be a string?  I do this, because I don't know how to
type check the PyObjects in C/c++.  I know it is in there somewhere, but I
was trying to be quick and it is like which ever one isn't null will be the
one I use.

"Fredrik Lundh" <fredrik at pythonware.com> wrote in message
news:000901bf6405$f7692360$f29b12c2 at secret.pythonware.com...
[snip]

is this the entire program, or are any user-written
C extensions involved in this?

a great way to get utterly weird errors is to have
a C extension function which ignores an internal
exception, but returns to Python without clearing
the error state (PyErr_Clear).

if you cannot fix the C code, you can clear the
error state from Python, using something like:

    mymodule.badfunction()
    hasattr(None, "none")

just after the C call.

</F>