Python doesn't catch exceptions ?

[Ivo Bellin Salarin]

Hi all,

I have a curious problem with Python exceptions.

The following code doesn't catch HttpError:
```
from server.libs.googleapiclient.errors import HttpError
[..]
    try:
        OAuth.backoffExec(request)
        return True
    except HttpError as e:
        return e.resp.status == 404
    except Exception as e:
        import inspect
        import os
        logging.error("caught exception: {}, defined in {}. we are in
{}".format(
            e.__class__.__name__,
            inspect.getfile(e.__class__),
            os.getcwd()
        ))
        logging.error("processed exception: {}, defined in {}.".format(
            HttpError.__name__,
            inspect.getfile(HttpError)
        ))
        logging.error('e is an HttpError? {}'.format(isinstance(e,
HttpError)))
```

This code generates instead the messages:
```
ERROR 47.135[bigquery.py.create_table:362] caught exception: HttpError,
defined in server/libs/googleapiclient/errors.pyc. we are in
/Users/nilleb/dev/gae-sample-project/app
ERROR 47.135[bigquery.py.create_table:366] processed exception: HttpError,
defined in
/Users/nilleb/dev/gae-sample-project/app/server/libs/googleapiclient/errors.pyc.
ERROR 47.136[bigquery.py.create_table:368] e is an HttpError? False
```

I haven't joined the paths in the messages above, but they are identical if
I do that manually:

```
/Users/nilleb/dev/gae-sample-project/app/server/libs/googleapiclient/errors.pyc
/Users/nilleb/dev/gae-sample-project/app/server/libs/googleapiclient/errors.pyc
```

Any ideas about how to diagnostic what's going wrong?

Thanks in advance,
nilleb
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