Python

The Python Walrus Operator

The Python walrus operator := assigns a value to a variable. But unlike assignment operator =, it also returns the assigned value. This extra feature makes it into an expression, which is a construct that produces a value. It allows the walrus operator to be used in contexts where an assignment and a value are both needed, such as within a conditional statement, loops and comprehensions.

The Python ‘in’ Operator

The Python in operator checks for the inclusion of an item within a collection object. It returns True if the item is included and False otherwise. The in operator is versatile and can be used with many data types such as strings, lists, tuples, dictionaries, and sets.

The Python None Value

In Python, None is a special constant that represents the absence of a value or a null value. It is an object of its own data type, the NoneType, and it is not equivalent to any other value or data type.

The Python ‘is’ Operator

The Python is operator determines whether two references (variables or literals) point to the same object in memory, i.e. whether they are the same object. The is operator is different from the equality operator ==, which checks whether the values of potentially two objects are equal.

Python Type Conversion

Type conversion in Python refers to the process of converting a value from one data type to another. This is a common task when writing code. It allows for more flexibility in how data is processed and ensures that operations between different types of data are error-free. Python performs some type conversions automatically, and also provides several built-in functions to convert between different data types.