如何在python3中运行python2程序？

Question

我正在尝试运行我在 Python3 中使用 Python2 程序编写的程序。我正在尝试对其语法进行任何必要的更改以使其正常工作，但我被困在以下代码行中。raise AttributeError, fn + ' is not a search function in search.py.'当我在 Python2 中运行它时它工作正常，但是在尝试在 Python3 中运行它时我不断收到以下语法错误。Traceback (most recent call last):  File "autograder.py", line 345, in <module>    moduleDict[moduleName] = loadModuleFile(moduleName, os.path.join(options.codeRoot, cp))  File "autograder.py", line 134, in loadModuleFile    return imp.load_module(moduleName, f, "%s.py" % moduleName, (".py", "r", imp.PY_SOURCE))  File "/usr/lib/python3.6/imp.py", line 235, in load_module    return load_source(name, filename, file)  File "/usr/lib/python3.6/imp.py", line 172, in load_source    module = _load(spec)  File "<frozen importlib._bootstrap>", line 684, in _load  File "<frozen importlib._bootstrap>", line 665, in _load_unlocked  File "<frozen importlib._bootstrap_external>", line 674, in exec_module  File "<frozen importlib._bootstrap_external>", line 781, in get_code  File "<frozen importlib._bootstrap_external>", line 741, in source_to_code  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed  File "searchAgents.py", line 71    raise AttributeError, fn + ' is not a search function in search.py.'                        ^SyntaxError: invalid syntax

Answer 1

这种引发异常的语法已从 python 3中删除

您需要将异常代码更改为：

raise AttributeError(fn + ' is not a search function in search.py.')

这个问题中提供的答案更详细 - Manually raise (throw) an exception in Python