python 内建函数basestring笔记

示例：

def isAString(obj):
    return isinstance(obj, basestring)    # isinstance(obj, (str, unicode)).

print isAString('abc')  # True
print isAString(u'您好')  # True
print isAString(list()) # False

doc:

basestring()
This abstract type is the superclass for
str and
unicode. It cannot be called or instantiated, but it can be used to test whether an object is an instance of
str or
unicode.
isinstance(obj,
basestring) is equivalent to isinstance(obj,
(str, unicode)).

New in version 2.3.