问题描述
在剖析我们的代码时，我惊奇地发现数百万次调用到
C：\Python26\lib\encodings\utf_8.py：15（decode）
When profiling our code I was surprised to find millions of calls to
C:\Python26\lib\encodings\utf_8.py:15(decode)
我开始调试，发现在我们的代码库中有许多小错误，通常将字符串与unicode进行比较，或添加sting和unicode。 Python慷慨解码字符串，并在unicode中执行以下操作。
I started debugging and found that across our code base there are many small bugs, usually comparing a string to a unicode or adding a sting and a unicode. Python graciously decodes the strings and performs the following operations in unicode.
怎么样但是昂贵！
我流利的unicode，读了和 ...
I am fluent in unicode, having read Joel Spolsky and Dive Into Python...
我尝试保留我们的代码内部文件为unicode。
I try to keep our code internals in unicode only.
我的问题 - 我可以关闭这个pythonic好人的行为吗？至少直到我找到所有这些错误并修复它们（通常是添加一个u'u'）？
My question - can I turn off this pythonic nice-guy behavior? At least until I find all these bugs and fix them (usually by adding a u'u')?
其中一些非常难找到（有时是字符串的变量...）。
Some of them are extremely hard to find (a variable that is sometimes a string...).
Python 2.6.5（我不能切换到3.x）
Python 2.6.5 (and I can't switch to 3.x).
推荐答案
以下内容应该可以工作： p>
The following should work:
>>> import sys
>>> reload(sys)
<module 'sys' (built-in)>
>>> sys.setdefaultencoding('undefined')
>>> u"abc" + u"xyz"
u'abcxyz'
>>> u"abc" + "xyz"
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/encodings/undefined.py", line 22, in decode
raise UnicodeError("undefined encoding")
UnicodeError: undefined encoding
reload（sys）上面的代码段中的code>仅在这里需要，因为通常 sys.setdefaultencoding 应该在 sitecustomize.py 文件在您的Python site-packages 目录（建议这样做）。
reload(sys) in the snippet above is only necessary here since normally sys.setdefaultencoding is supposed to go in a sitecustomize.py file in your Python site-packages directory (it's advisable to do that).
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