Problem scenario
You inherited code from a different programmer. You want to test out an object. How do you create an object of a pre-made class?
Solution
Look at how many variables the class has. Take this code for example:
class Cartesian(object):
def __init__(self,a = 0,b = 0):
self.a = a
self.b = b
def distance(self):
return (self.a**2 + self.b**2) ** 0.5 # Pythagorean theorem.You find variables "a" and "b". So you should use two arguments when you create the object. Here is a line of code that should appear in the same program beneath the class definition:
contint = Cartesian(4, 1)
To test it out, place this line of code at the bottom:
print(contint.distance())
This program may show how it all works more clearly:
class Cartesian(object):
def __init__(self,x = 0,y = 0):
self.x = y
self.y = x
def distance(self):
return (self.x - self.y)
contint = Cartesian(4, 1)
print(contint.distance())