Question

I was looking at this SO question about the Python For Else flow control and I thought I had a portion of code that which is very close to the example given.我认为我的代码非常接近示例代码，除了我希望for循环完成（用于记录目的）。

for module_name, class_name in BASIC_PARSERS_TO_RUN:
    full_module_name = "parsers." + module_name
    parser = getattr(import_module(full_module_name), class_name)(
        logger=logger)
    parser_data = parser.parse(cluster_path)

    if parser_data is None or parser_data == "0":
        # Basic None instead of "None" so that json is serialized to null
        # instead of "None"
        json_data_list.append({module_name: parser_data})
        failed_basic_checks = True
    else:
        json_data_list.append({module_name: str(parser_data)})

# Checking if we have a valid data set.
if failed_basic_checks:
    json_data_list.append({"basic_validation_succeeded": False})
    return json.dumps(json_data_list)
    # We've run into a dataset which isn't valid.
    exit(1)

有没有办法改变我的for循环以使用for else流量控制？

found_obj = None
for obj in objects:
    if obj.key == search_key:
        found_obj = obj
        break
else:
    print 'No object found.'

Answer 1

编写的代码很好;我没有理由使用for / else结构。

根据the docs，除非循环被else语句终止，否则总是执行循环之后的break。因此，如果您不在循环中使用break语句，则不需要else子句;你应该简单地把相关的代码放在循环之后。

如果你想让for循环始终完成，如何使用For Else？

1 个答案: