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

问题描述

我正在尝试使用名为 bidi 的 Python 包.在这个包中的一个模块 (algorithm.py) 中，有一些行给我错误，尽管它是包的一部分.

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.

这里是几行:

# 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

这里是错误信息:

Traceback (most recent call last):
  File "<pyshell#25>", line 1, in <module>
    bidi_text = get_display(reshaped_text)
  File "C:Python33libsite-packagespython_bidi-0.3.4-py3.3.eggidialgorithm.py",   line 602, in get_display
    if isinstance(unicode_or_str, unicode):
NameError: global name 'unicode' is not defined

我应该如何重写这部分代码以便它在 Python3 中工作?另外，如果有人在 Python 3 中使用过 bidi 包，请告诉我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类型已被替换为 bytes.

Python 3 renamed the unicode type to str, the old str type has been replaced by bytes.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

您可能需要阅读 Python 3 移植 HOWTO 以了解更多此类详细信息.还有 Lennart Regebro 的移植到 Python 3:深入指南，在线免费.

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一点，您可以尝试使用 2to3 工具 看看它如何为您翻译代码.

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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