# My method returns an address at the link of a value

Hi,

This is an exercise that is not part of the training on the site, I do not understand why when I want to display the return value of the energy method of my satellite class, I receive an address on the console.

Zoe satellite speed = 40.0m / s.
<bound method Satellite.energie of <__ main . Satellite object at 0x01A5E610 >>
Zoe satellite speed = 70.0m / s.
<bound method Satellite.energie of <
main __. Satellite object at 0x01A5E610 >>

this is my code

``````class Satellite (object):
"" "Satellite for instantiating objects simulating satellites
artificial launched into space, around the earth. "" "

def __init __ (self, name, mass = 100, speed = 0):
self.name = name
self.mass = mass
speed choke = speed

def impulse (self, force, duration):
"" "will vary the speed of the satellite." ""

speed self = speed self + (force * duration) / mass self

def energy (self):
"" "will refer to the program calling the kinetic energy value of the satellite" ""
return_val = self.mass * self.speed ** 2/2
return return_val

def display_speed (self):
"" "will display the name of the satellite and its current speed." ""
print ("satellite speed {0} = {1} m / s.". format (self.name, self.speed))

s1 = Satellite ('Zoe', mass = 250, speed = 10)
s1.pulse (500, 15)
s1.display_speed ()
print (s1.energy)
s1.pulse (500, 15)
s1.display_speed ()
print (s1.energy)
``````

both `.speed()` and `.energy()` are methods, yet you call/invoke `speed()` correctly while with `energy` you are only referencing the method

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