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BasicClass.py

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#Class can be defined with keyword class

#Variables and methods are indented same as in functions

#Basic structure of class is as follow:

#class ClassName:

# "This is version 1.0" -- Optional documentation string

# (Variables)

# Instance Variables, Static Variables, Local Variables

# (Methods)

# Instance Methods, Static Methods, Class Methods

#Functions are written outside the class

#Methods are written inside the class

class Employee:

''' This is the version 1.0 of Employee class''' #doc string

#Defining constructor of class Employee

#self refers to the current object (same like this in java programming)

#any variable defined with self is an instance variable in python

def __init__(self):

super().__init__()

self.name = 'EmployeeA' #Instance Variable name

self.organisation = 'OrgA' #Instance Variable organisation

self.salary = '100000' #Instance Variable salary

def __str__(self):

return 'This is Employee class'

def display(self):

print('Employee Name: ',self.name)

print('Employee Org: ',self.organisation)

print('Employee Salary: ',self.salary)

#Following code is not indented hence, not part of the class code

e = Employee() #Constructor is called and variables will be initialized

print(e.name) #Output: EmployeeA

print(e.organisation) #Output: OrgA

print(e.salary) #Output: 100000

print(e.__doc__) #Output: This is the version 1.0 of Employee class

print(e) #Output: This is Employee class

#Explicitly call the constructor method

e.__init__()

# call display method to print class variable values

e.display()

#Output:

#Employee Name: EmployeeA

#Employee Org: OrgA

#Employee Salary: 100000

#Important Notes:

#self is not a keyword or reserved word in python

#we can use any name instead of self like this

#The first parameter paased to any instance method is pointing to the current object