Question

我正在为Python 3.2编辑libtaxii的脚本，因为它是为Python 2.7编写的。我正在使用以下函数将内容块写入文件。这是功能：

def write_cbs_from_poll_response_11(self, poll_response, dest_dir, write_type_=W_CLOBBER):

    for cb in poll_response.content_blocks:
        if cb.content_binding.binding_id == CB_STIX_XML_10:
            format_ = '_STIX10_'
            ext = '.xml'
        elif cb.content_binding.binding_id == CB_STIX_XML_101:
            format_ = '_STIX101_'
            ext = '.xml'
        elif cb.content_binding.binding_id == CB_STIX_XML_11:
            format_ = '_STIX11_'
            ext = '.xml'
        elif cb.content_binding.binding_id == CB_STIX_XML_111:
            format_ = '_STIX111_'
            ext = '.xml'
        elif cb.content_binding.binding_id == CB_STIX_XML_12:
            format_ = '_STIX12_'
            ext = '.xml'
        else:  # Format and extension are unknown
            format_ = ''
            ext = ''

        if cb.timestamp_label:
            date_string = 't' + cb.timestamp_label.isoformat()
        else:
            date_string = 's' + datetime.datetime.now().isoformat()

        filename = gen_filename(poll_response.collection_name,
                                format_,
                                date_string,
                                ext)
        filename = os.path.join(dest_dir, filename)
        write, message = TaxiiScript.get_write_and_message(filename, write_type_)

        if write:
            with open(filename, 'w') as f:
                f.write(cb.content)           # The TypeError is thrown here

        print("%s%s" % (message, filename))

我当前的问题是其中一个变量cb.content正在抛出一个类型错误：

TypeError: must be str, not bytes

这是一个简单的修复：我使用转换器f.write(cb.content.decode("utf-8"))代替该行，然后抛出一个AttributeError：

AttributeError: 'str' object has no attribute 'decode'

所以解释器知道它是一个字符串，但它不识别它？我真的不是100％肯定。

提前感谢所有比我聪明的人！

Answer 1

“可能结果来自for循环中for cb的两个不同迭代。编写代码以便能够将cb.content作为str或bytes对象处理” - glibdud

Glibdud是绝对正确的。我在下面添加了f.write（cb.content）：

if type(cb.content) is str:
    f.write(cb.content)
elif type(cb.content) is bytes:
    f.write(cb.content.decode('utf-8'))

效果很好。谢谢你们！

Python 3.2中TypeError问题的AttributeError

1 个答案: