cclauss 6848708377 old style exception, raise --> new style for Python 3 (#10082)
* old style raise --> raise() for Python 3

* old style exception --> new style for Python 3

* old style exception --> new style for Python 3

* old style exception --> new style for Python 3

* old style exception --> new style for Python 3

* old style exception --> new style for Python 3

* old style exception --> new style for Python 3

* old style exception --> new style for Python 3

* old style exception --> new style for Python 3

* old style exception --> new style for Python 3

* old style raise --> raise() for Python 3

* old style raise --> raise() for Python 3

* old style exception, raise --> new style for Python 3
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