What is init in python

Classes in Python have an __init__() function. This function is executed when the class is initialized. Let’s take a look at some key points of __init__ -

• Classes in Python have an __init__() function.

• Similar to the constructor in Java, the __init__() function is executed when the object is created.

• __init__() function will be called automatically.

• It is used to assign values ​​to the properties of objects.

• __init__() method can have flexible parameters. To do this, the arguments passed to the class instantiation operator are passed to __init__().

• When a class defines an __init__() method, the instantiation of the class will automatically call the __init__() method to create a new class instance.

Create a class with __init__() method

Example

Let’s create a class using __init__() -

class Student:
   def __init__(self, name, rank, points):
      self.name = name
      self.rank = rank
      self.points = points

# Creating an object
st = Student("David", 2, 90)

print("Student Name = ",st.name)
print("Student Rank = ",st.rank)
print("Student Points = ",st.points)

Output

Student Name =  David
Student Rank =  2
Student Points =  90

Create a class with __init__() and custom methods

Example

We will create a class with __init__() here and we will also create and call a custom function -

class Students:
   def __init__(self, name, rank, points):
      self.name = name
      self.rank = rank
      self.points = points

   # custom function
   def demofunc(self):
      print("I am "+self.name)
      print("I got Rank ",+self.rank)

# create 4 objects
st1 = Students("Steve", 1, 100)
st2 = Students("Chris", 2, 90)
st3 = Students("Mark", 3, 76)
st4 = Students("Kate", 4, 60)

# call the functions using the objects created above
st1.demofunc()
st2.demofunc()
st3.demofunc()
st4.demofunc()

Output

I am Steve
I got Rank  1
I am Chris
I got Rank  2
I am Mark
I got Rank  3
I am Kate
I got Rank  4

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