Python Static method are powerful tools that can make complex concepts easy to understand. It is a method that is run once, at program startup time, regardless of how often the object it applies to is instantiated. Static methods are often used to initialize objects or perform other low-level work that should not be affected by the program’s state or the number of times the object is used.
In this article, we will be exploring the concept of static methods in Python. By the end of this article, you should understand what static methods are and how they can be used in your Python applications. So let us get started.
Table of Contents
What is Static Method ?
Static Method in Python is a keyword that denotes a specific type of method that does not invoke the instance of an object. This means that the invoked code will be the same every time it is called, irrespective of the current state or class of the object being used.
Create Static Method by using staticmethod( )
Staticmethod() is a method of object-oriented programming that allows you to create static methods. A static method is an executable procedure or function that can be called without creating a new instance of the object it operates on. This makes it easy to share code between classes and reduces the number of memory allocations made by your application.
To create a static method, you can use the staticmethod() function. This function takes two parameters: the method’s name and a class object to identify the method.
class Multiplication:
def Numbers(a, b):
return a * b
Multiplication.Numbers = staticmethod(Multiplication.Numbers)
print('answer is:', Multiplication.Numbers(8, 9)) Output
Static Method inside Class
A static method is an internal class method that provides a special way of referring to a particular class instance. This can be useful when you want to avoid the costs associated with creating and destroying multiple instances of the class each time you need access to its members. This can also be helpful if you want to keep track of which objects are currently in use and avoid memory leaks. Additionally, static methods are called once per class at load time so that they can execute faster than regular methods.
class eating:
#creating staticmethod
def start():
print("start eating")
def stop():
print("stop eating!")
eating.start()
eating.stop() Output
Calling Static Method using Object
Calling a static method using an object is quite simple. Just pass the class of your object as the first parameter to the method, and any necessary variables will be automatically included in the call. For example, when you call a staticmethod, the compiler can create a copy of the object and use that instead of creating another instance every time it has called.
class eating:
#creating staticmethod
def start():
print("*start eating")
def stop(self):
print("stop eating!!")
eating.start()
obj = eating()
obj.stop() Output
Create Utility Function as Static Method
There is no built-in method for doing this in Python, but you can create a static function to do the job. A utility function accepts two arguments: the first is a list of items, and the second is an arbitrary value that will be returned when all items in the first list have been processed.
class email:
def __init__(self, email):
self.email = email
def getemail(self):
return self.email
@staticmethod
def toDashEmail(email):
return email.replace(".", "@")
email = email("[email protected]")
emailFromDB = "[email protected]"
emailWithDot = email.toDashEmail(emailFromDB)
if(email.getemail() == emailWithDot):
print("Equal")
else:
print("Unequal") Output
Working of Inheritance with Static Method
When you inherit an object from a static method, the newly created instance of that class will have its base properties (i.e., public fields and methods) set to the values that were passed in when the inherited object was created. Therefore, any changes you make to those settings on your copy of the object will not be reflected in instances of that class generated from other static methods or objects.
class email:
def __init__(self, email):
self.email = email
def getemail(self):
return self.email
@staticmethod
def toDashemail(email):
return email.replace(".", "@")
class emailWithdot(email):
def getemail(self):
return email.toDashemail(self.email)
email = email("[email protected]")
emailFromDB = emailWithdot("[email protected]")
if(email.getemail() == emailFromDB.getemail()):
print("Equal")
else:
print("Unequal") Output
Learn more in detail about, Multiple Inheritance in Python.
FAQs
Can static method be called with self?
Since self is an instance of the class with the static method, you may invoke it. Since a static method doesn’t need an object instance as its first argument, you may also invoke it directly on classes.
What is the difference between Class method and Static Method ?
-A class method is a built-in function that is used to create a factory method. It is associated with a class, and is called from within the class itself, it can also modify a class variable.
– A static method is a function that is associated with a class, and it is called by the compiler from outside the class.
Conclusion
Python is a popular high-level programming language. Python static method make sure the system does not keep changing from one instance to another and thus reduces the chances of your program getting compromised. whenever your code uses instance-based methods, make sure you use static ones instead. You can then enjoy easy maintenance and stability of your application’s codebase. Thanks for reading.
