-Mass and Weight- | Python Fiddle

"""======================================================================
Program:	
	Newtons Weight Calculator
Author:		
	Chris Brockamp
Date:		
	April 12, 2015
Dev Env:	
	Python Fiddle
Description: 
	Gets the mass of an object from the user and then calculates and 
    displays the object's weight in newtons.
======================================================================"""

#_declare constant_______________________________________________________
GRAVITY = 9.8

#_define functions_______________________________________________________
def calculate_weight(mass):
    weight = mass * GRAVITY
    if weight < 10:
        print "The object's mass is too light to calculate its weight..."
    elif weight > 1000:
        print "The object's mass is too heavy to calculate its weight..."
    else:
        print "The object's weight is: " + str(weight) + " Newtons"

#_main___________________________________________________________________
mass = input("Enter the object's mass in kilograms: ")
print mass
calculate_weight(mass)

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