python - Python语法错误

Question

我想知道我在语法上做错了什么。
我正在尝试执行一个脚本，它返回了很多错误，其中大多数是try-exception(示例1,2,3)，而示例4则有问题...
有人在这里看到问题吗？
范例1:

def post(self, data):
        post_data = json.dumps(data)
        if VERBOSE:
            sys.stderr.write("\nDEBUG: POST data: %r\n" % post_data)
        try:
            # Watch out: we must provide the verify keyword to every individual request call!
            # Else it will be overwritten by the REQUESTS_CA_BUNDLE env variable
            raw_response = self._session.post(self.base_url,
                                              data=post_data,
                                              verify=self._session.verify)
        except () if DEBUG else Exception, exc:
            sys.stderr.write("ERROR: %s\n" % exc)
            raise SkipMBean(exc)

        return validate_response(raw_response)

范例2:

def _get_queries(do_search, inst, itemspec, title, path, mbean):
    if not do_search:
        return [(mbean + "/" + path, title, itemspec)]

    try:
        value = fetch_var(inst, "search", mbean)
    except () if DEBUG else SkipMBean:
        return []

    try:
        paths = make_item_list((), value, "")[0][1]
    except IndexError:
        return []

    return [("%s/%s" % (urllib2.quote(mbean_exp), path), path, itemspec) for mbean_exp in paths]

范例3:

def _process_queries(inst, queries):
    for mbean_path, title, itemspec in queries:
        try:
            for item, out_title, value in fetch_metric(inst, mbean_path, title, itemspec):
                yield item, out_title, value
        except (IOError, socket.timeout):
            raise SkipInstance()
        except SkipMBean:
            continue
        except () if DEBUG else Exception:
            continue

范例4:

def generate_values(inst, var_list):
    for var in var_list:
        mbean, path, title, itemspec, do_search = var[:5]
        value_type = var[5] if len(var) >= 6 else None

        queries = _get_queries(do_search, inst, itemspec, title, path, mbean)

        for item, title, value in _process_queries(inst, queries):
            if value_type:
                yield item, title, value, value_type
            else:
                yield item, title, value

这是它发出的错误之一，例如1:

File "jolokia_metrics", line 342
    except () if DEBUG else Exception, exc:
               ^
SyntaxError: invalid syntax

Answer 1

except () if DEBUG else Exception, exc: 
except () if DEBUG else SkipMBean:
except () if DEBUG else Exception:

较新版本的Python不支持此语法。
https://docs.python.org/3/tutorial/errors.html