python 中 basestring 和 types.StringType 的区别？
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Difference in python between basestring and types.StringType?
提问by YGA
What's the difference between:
有什么区别：
isinstance(foo, types.StringType)
and
和
isinstance(foo, basestring)
?
?
回答by Luká? Lalinsky
For Python2: basestringis the base class for both strand unicode, while types.StringTypeisstr. If you want to check if something is a string, use basestring. If you want to check if something is a bytestring, use strand forget about types.
对于Python2：basestring是两个基类str和unicode，而types.StringType为str。如果你想检查某个东西是否是一个字符串，请使用basestring. 如果您想检查某个东西是否是字节串，请使用str并忘记types.
回答by John La Rooy
This stuff is completely different in Python3
这个东西在Python3中完全不同
typesnot longer has StringTypestris always unicodebasestringno longer exists
types不再有StringTypestr总是unicodebasestring不再存在
So try not to sprinkle that stuff through your code too much if you might ever need to port it
因此，如果您可能需要移植它，请尽量不要在您的代码中过多地撒播这些东西
回答by Alex Martelli
>>> import types
>>> isinstance(u'ciao', types.StringType)
False
>>> isinstance(u'ciao', basestring)
True
>>>
Pretty important difference, it seems to me;-).
非常重要的区别，在我看来;-)。
回答by Tobias
For Python 2.x:
对于 Python 2.x：
try:
basestring # added in Python 2.3
except NameError:
basestring = (str, unicode)
...
if isinstance(foo, basestring):
...
Of course this might not work for Python 3, but I'm quite sure the 2to3 converter will take care of the topic.
当然，这可能不适用于 Python 3，但我很确定 2to3 转换器会处理这个话题。
