PyFile:RaiseFrom.py
  PyRaiseStatement
    PsiElement(Py:RAISE_KEYWORD)('raise')
    PsiWhiteSpace(' ')
    PyReferenceExpression: SyntaxError
      PsiElement(Py:IDENTIFIER)('SyntaxError')
    PsiWhiteSpace(' ')
    PsiElement(Py:FROM_KEYWORD)('from')
    PsiWhiteSpace(' ')
    PyReferenceExpression: exc
      PsiElement(Py:IDENTIFIER)('exc')