Introduction to Python Function vs Method
Every newcomer is likely to be perplex by the distinction between a python function vs method. Well, they both have one sole aim in life: to carry out some sort of operation. And they’re both capable of returning something useful.
But first, let’s refresh our memory on the two of them, namely Python Functions and Python Methods.
Simply described, a function is a collection of actions that are executed as a single unit and “encapsulated” under one name. It is a collection of assertions capable of completing certain tasks.
A program’s function can receive parameters (that is, the data to operate on) and optionally return some data after completing the task. Giving your computer well-defined instructions to complete a task is what creating a function entails.
As a result, we can write a basic function in three easy steps:
- def addition() states, “Hey, computer, give me an add function.”
- The statement def Addition (num1, num2) tells the computer that the add function should take two inputs. This is when code reusability comes into play.
- By giving the arguments the generalized names a and b, we’re implying that a and b can be 2 and 3, respectively, in some cases, and 10 and 30 in others.
- make sure to include (num1, num2)
- return num1 + num2
This tells the computer, “Hey, computer, let my function return something,” in this case, the sum of a and b.
Finally, the function is refer to as:
This gives us a total of 10 and 30, which is 50.
Python Functions Types
Like many other programming languages, Python has two types of functions:
Python Built-in Functions
Built-in functions are part of Python’s extensive standard library. These are functions that were define by some programmers somewhere in the globe a long time ago, and you may now use them in your software without having to rewrite them.
If you want to learn more about python built-in functions then read our article Python Built-In Functions with Syntax and Examples
As an example, the print() function prints some output to the screen.
Python User-defined functions
Python allows us to create and use custom functions that can be use anywhere in our program. The add() method we wrote earlier is an example of this.
def addition(num1, num2): return num1 + num2 print(addition(73, 7))
In object-oriented programming, objects have attributes, which are data values. But how can we get at the values of these attributes? Methods are use to gain access to them.
An Object’s behavior is represent through methods. A method is a piece of code that is attach to an object and performs operations on its data. In most ways, a method and a function are the same things. With the exception of two important differences:
- It is link to an object, and we refer to it as being ‘on’ that object.
- It works with the information contained in the class.
Note: Remember that a class is a template and an object is a class instance.
Because a method is link to an object, designing and implementing one is similar to defining functions:
- A method is always define within a class.
- The initial parameter of a method declaration is always self.’
- Finally, we use the dot operator to invoke a method on an object.
To better comprehend techniques, consider the following example.
class Car: def horse_power(self): print("900hp") bughatti = Car() bughatti.horse_power()
We define a method sound inside a class Car in this example. After that, we constructed a Ferrari object of the Car class. Finally, we call the Ferrari object’s sound() method.
Let’s now focus on the distinctions we’ve discovered.
Difference between Python Methods and Functions – Python Function vs Method?
|The definitions of methods are always contained within a class.||A class isn’t required to define a function.|
|Methods are linked to the objects of the class to which they belong.||In a program, functions are self-contained entities.|
|The initial argument of any method must be self.’||Objects are not connected with functions.|
|An object is referred to as being ‘on’ by a method. We can’t just call it by its name||Functions work with the data you provide them as arguments.|
|Methods can work with the data of the object they’re linked to.||A function can be called simply by its name.|
|Methods are defined by the class to which they belong.||There is no need for the self parameters in functions. They can have a single argument or multiple arguments.|
Conclusion of Python Function vs Method
We may conclude that Methods and Functions are two possibilities that appear in your Multiple Choice Questions that are extremely comparable. When you first see them, they look to be the same, but they are vastly different in reality.
Both methods and functions, in a nutshell, perform tasks and may return some value. The distinction is that methods are ‘related’ with objects, but functions are not.