Except and raise statement python 3 compatible style (#3216)
* changes exception and raise statements to python 3 style
* changes except statement to python 3 style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* changes except and raise statement to python 3 compatible style
* adds six.reraise to fix python 3 style raise statements with traceback
* fixes indentation
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