__init__ python
The __init__ function serves two main purposes.
The first is its used as a tool to pass
arguments inside of it but the difference is you can spread those
arguments to other functions locaed in the same class.
To do this you would place the word (self.) keyword in another functions
followed by the arguments name. This allows the argument to be spread
down to that function.
The second purpose is it allows you to pass arguments to a
class when calling the class. Without this function inside the class
when you call the class no arguments would be able to go inside getting
nothing in return.
class Rectangle:
def __init__(self, length, breadth, unit_cost=0):
self.length = length
self.breadth = breadth
self.unit_cost = unit_cost
def get_area(self):
return self.length * self.breadth
def calculate_cost(self):
area = self.get_area()
return area * self.unit_cost
# breadth = 120 units, length = 160 units, 1 sq unit cost = Rs 2000
r = Rectangle(160, 120, 2000)
print("Area of Rectangle: %s sq units" % (r.get_area()))