How to Effectively Check Object Types in Python?

How to Check for Types in Python

In Python, there are two primary ways to determine the type of an object: isinstance() and type().

isinstance()

The isinstance() function checks if an object is an instance of a given class or its subclasses. For example, to check if an object o is of type str:

<br>if isinstance(o, str):</p>
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type()

The type() function returns the object's exact type. This allows you to differentiate between subclasses. For instance, to verify that o is strictly of type str, excluding subclasses:

<br>if type(o) is str:</p>
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Additional Notes

• In Python 2, use isinstance(o, basestring) to check for strings, as unicode is not a subclass of str.


• Alternatively, isinstance() accepts tuples of classes. For instance, isinstance(o, (str, unicode)) returns True if o is an instance of any subclass of str or unicode.

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