NameError:未定义全局名称"unicode"-在Python 3中 [英] NameError: global name 'unicode' is not defined - in Python 3

问题描述

我正在尝试使用一个名为bidi的Python包.在此软件包(algorithm.py)的模块中，尽管它是该软件包的一部分，但仍有一些行会给我带来错误.

I am trying to use a Python package called bidi. In a module in this package (algorithm.py) there are some lines that give me error, although it is part of the package.

以下是这些行:

# utf-8 ? we need unicode
if isinstance(unicode_or_str, unicode):
    text = unicode_or_str
    decoded = False
else:
    text = unicode_or_str.decode(encoding)
    decoded = True

，这是错误消息:

Traceback (most recent call last):
  File "<pyshell#25>", line 1, in <module>
    bidi_text = get_display(reshaped_text)
  File "C:\Python33\lib\site-packages\python_bidi-0.3.4-py3.3.egg\bidi\algorithm.py",   line 602, in get_display
    if isinstance(unicode_or_str, unicode):
NameError: global name 'unicode' is not defined

我应该如何重新编写代码的这一部分，使其可以在Python3中使用? 另外，如果有人在Python 3中使用了bidi软件包，请让我知道他们是否发现了类似的问题.感谢您的帮助.

How should I re-write this part of the code so it works in Python3? Also if anyone have used bidi package with Python 3 please let me know if they have found similar problems or not. I appreciate your help.

推荐答案

Python 3将unicode类型重命名为str，旧的str类型已由bytes替换.

Python 3 renamed the unicode type to str, the old str type has been replaced by bytes.

if isinstance(unicode_or_str, str):
    text = unicode_or_str
    decoded = False
else:
    text = unicode_or_str.decode(encoding)
    decoded = True

您可能想阅读 Python 3移植HOWTO 以获得更多此类详细信息.还有Lennart Regebro的移植到Python 3:深入指南，可免费在线获得.

You may want to read the Python 3 porting HOWTO for more such details. There is also Lennart Regebro's Porting to Python 3: An in-depth guide, free online.

最后但并非最不重要的是，您可以尝试使用 2to3工具来了解如何为您翻译代码.

Last but not least, you could just try to use the 2to3 tool to see how that translates the code for you.

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