NameError: name 'distancepoint' is not defined

import math
class point:
    def __init__(self,p1,p2):
        self.p1 = p1
        self.p2 = p2
    def distancepoint(self):
        x1,y1 = self.p1
        x2,y2 = self.p2
        distance = math.sqrt((x1-x2)**2 + (y1-y2)**2)
        return distance
p1 = point(2,4)
p2 = point(1,6)

distance = distancepoint(p1,p2)
print (f'Distance between 2 points: {distance}')

I am a Python beginner. I dont know how to fix this problem.

>Solution :

You have two options here:

• The way your code is written, distancepoint should be a regular function (outside of a class), that takes two point objects as an input and returns a distance:

import math


class Point: # python devs usually use CamelCase for class names
    def __init__(self, x, y): # x and y, because we have two coordinates, not two points
        self.x = x 
        self.y = y


def distancepoint(p1, p2):
    x1, y1 = p1.x, p1.y
    x2, y2 = p2.x, p2.y

    distance = math.sqrt((x1 - x2) ** 2 + (y1 - y2) ** 2)
    return distance



p1 = Point(2, 4)
p2 = Point(1, 6)

distance = distancepoint(p1, p2)
print(f"Distance between 2 points: {distance}")

• Another way to go about it, which you seemed to be aiming at, is to define distancepoint as a method of the Point class. That means you can measure the distance
  from a given Point object to another Point.

class Point: # python devs usually use CamelCase for class names
    def __init__(self, x, y): # x and y, because we have two coordinates, not two points
        self.x = x 
        self.y = y


    def distance(self, other_p):
        x1, y1 = self.x, self.y
        x2, y2 = other_p.x, other_p.y

        distance = math.sqrt((x1 - x2) ** 2 + (y1 - y2) ** 2)
        return distance

p1 = Point(2, 4)
p2 = Point(1, 6)

distance = p1.distance(p2)
print(f"Distance between 2 points: {distance}")