Python function-basestring ()

Basestring ()

Description: Basestring is a superclass of STR and Unicode (parent class), which is also an abstract class, and therefore cannot be called and instantiated, but can be used to determine whether an object is a str or an instance of Unicode, isinstance (obj, basestring) Equivalent to Isinstance (obj, (str, Unicode));

Version: python2.3 version later introduced this function, compatible with python2.3 later python2 versions. Note: This function is discarded in python3, so the function cannot be used in Python3.

Example:

>>> isinstance ("Hello World", str)

True

>>> isinstance ("Hello World", basestring)

True

>>> isinstance (U "Hello", Unicode)

True

>>> isinstance (U "Hello", basestring)

True

Here's a practical one.

A quick and easy way to check whether an object is a string or Unicode object is to use the built-in isinstance and basestring, as follows:

def isastring (anobj):

Return Isinstance (Anobj, basestring)

This function is still useful, but be aware of its version requirements

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