使python 3异常向后兼容

Question

此代码块的后向（如果可能的话）2.6兼容语法是什么（来自PEP 3109）：

try:
   self.spawn(pp_args)
except DistutilsExecError as msg:
   raise CompileError from msg

Answer 1

这就像你在python-2.x中那样接近：

try:
   self.spawn(pp_args)
except DistutilsExecError as msg:
    print "DistutilsExecError : " + str(DistutilsExecError(msg))
    print
    print "The above exception was the direct cause of the following exception:"
    raise CompileError