Ivo Bellin Salarin wrote:
> 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?
Make sure your program starts from scratch. There may be a "helpful"
reload() that leaves the server in an inconsistent state. Here's a demo:
$ cat reload_demo.py
import binhex
from binhex import Error
for message in ["first", "second"]:
try:
raise Error(message)
except binhex.Error as err:
print "caught", err
reload(binhex) # this creates a new Error class which will not be caught
$ python reload_demo.py
caught first
Traceback (most recent call last):
File "reload_demo.py", line 6, in <module>
raise Error(message)
binhex.Error: second
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