Python Program to Differentiate Between type() and isinstance()

To understand this example, you should have the knowledge of the following Python programming topics:

Difference between type() and isinstance()

Let's understand the difference between type() and isinstance() with the example code below.

class Polygon:
    def sides_no(self):

class Triangle(Polygon):
    def area(self):

obj_polygon = Polygon()
obj_triangle = Triangle()

print(type(obj_triangle) == Triangle)   	# true
print(type(obj_triangle) == Polygon)    	# false

print(isinstance(obj_polygon, Polygon)) 	# true
print(isinstance(obj_triangle, Polygon))	# true



In the above example, we see that type() cannot distinguish whether an instance of a class is somehow related to the base class. In our case, although obj_triangle is an instance of child class Triangle, it is inherited from the base class Polygon. If you want to relate the object of a child class with the base class, you can achieve this with isinstance().

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