solution.py

# Now that we have a Block let's move on to something slightly more complex: a Sphere.

# Arguments for the constructor
# radius -> integer or float (do not round it)
# mass -> integer or float (do not round it)

# Methods to be defined
# get_radius()       =>  radius of the Sphere (do not round it)
# get_mass()         =>  mass of the Sphere (do not round it)
# get_volume()       =>  volume of the Sphere (rounded to 5 place after the decimal)
# get_surface_area() =>  surface area of the Sphere (rounded to 5 place after the decimal)
# get_density()      =>  density of the Sphere (rounded to 5 place after the decimal)

# Example
# ball = Sphere(2,50)
# ball.get_radius() ->       2
# ball.get_mass() ->         50
# ball.get_volume() ->       33.51032
# ball.get_surface_area() -> 50.26548
# ball.get_density() ->      1.49208

import math


class Sphere:
    def __init__(self, radius, mass):
        self.radius = radius
        self.mass = mass
        self.volume = round((4 / 3) * math.pi * self.radius**3, 5)

    def get_radius(self):
        return self.radius

    def get_mass(self):
        return self.mass

    def get_volume(self):
        return self.volume

    def get_surface_area(self):
        return round(4 * math.pi * self.radius**2, 5)

    def get_density(self):
        return round(self.mass / self.volume, 5)