Python Null object is the singleton None. There’s no null value in Python; instead, there’s None. The equivalent of the null keyword in Python is None. Many would argue that the word “null” is somewhat esoteric. It’s not exactly the friendliest word to programming novices.  Also, “None” refers precisely to the intended functionality – it is nothing, and has no behavior. In Python, None is the object and first-class citizen!

History of Null

Many programming languages use Null to represent a pointer that doesn’t point to anything, its kind of placeholder when a variable is empty, or to mark default parameters that you haven’t supplied yet. The Null is often defined to be 0 in those languages, but Null in Python is different.

In most object-oriented languages, the naming of objects tends to use camel-case syntax. Eg. ThisIsMyObject. As you’ll see soon, Python’s None type is an object and behaves like one.

As stated already, the most accurate way to test that something has been given None as the value is to use the is identity operator, which tests that two variables refer to the same  object.

In other programming languages, for example, this is how you may create a null variable in PHP and Java. Let’s see how other Java and PHP define a Null variable.

#python #python null #java #php