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我有這樣的代碼(Python 2.5的,GAE開發服務器):的Python:捕捉特定的異常
try:
yt_service.UpgradeToSessionToken() // this line produces TokenUpgradeFailed
except gdata.service.TokenUpgradeFailed:
return HttpResponseRedirect(auth_sub_url()) # this line will never be executed (why?)
except Exception, exc:
return HttpResponseRedirect(auth_sub_url()) # instead this line is executed (why?)
所以我在最後一行設置斷點,並在調試器下我明白了:
"exc" TokenUpgradeFailed: {'status': 403, 'body': 'html stripped', 'reason': 'Non 200 response on upgrade'}
"type(exc)" type: <class 'gdata.service.TokenUpgradeFailed'>
"exc is gdata.service.TokenUpgradeFailed" bool: False
"exc.__class__" type: <class 'gdata.service.TokenUpgradeFailed'>
"isinstance(exc, gdata.service.TokenUpgradeFailed)" bool: False
"exc.__class__.__name__" str: TokenUpgradeFailed
我錯過了python異常處理?爲什麼isinstance(exc,gdata.service.TokenUpgradeFailed)是False?