human
I am working on the file ".ipynb_checkpoints/Python_Basics-checkpoint.ipynb".
The first task is:
Now it's your turn again.
* Define a function which returns the gravitational force (you can use the one you have written before) 
* create a list of masses of your choice
* use a loop to iterate over all masses and print the gravitational force for each mass
Objects
Let's say we want to write a game where some kind of creatures interact with each other. During the game we have to keep track of different properties of each creature and each creature should have certain functions it can perform. To store all these properties and and functions in one place we can create an object. Have a look at the following code:
Can you write Python program for it?
assistant
#Here is Python program to print the gravitational force for each mass
.

# First, we have to define what properties and functions our object should have.
# Our object will later be created as an instance of the class we define here.
class Creature:
    # In the __init__ function we define what happens when an instance of this class is created.
    # Note that each function in an object gets the object itself as first input argument.
    def __init__(self, initial_health, start_position):
        self.health = initial_health  # Here, we set a property of our object called health to initial_health. 
        self.position = start_position
    
    # Here we define some functions (also called methods) our object should have. 
    def move(self, new_position):
        self.position = new_position
    
    def attack(self, target):
        target.health -= 5

        
# Now, that we have defined what a creature is we can create instances of the creature class.
# Here, we create a creature object called bob and one called eve.
# The following statement calls the __init__ function of the Creature class 
# and passes an initial_health and a start_position.
# The start position is passed as a list containing an x and a y coordinate.
bob = Creature(100, [5, 3])
eve = Creature(120, [4, 3])

# the object properties and functions can be accessed by object_name.property:
print('Bob\'s health is:', bob.health)
print('Eve\'s health is:', eve.health)

eve.attack(bob)

print('after Eve\'s attack Bob\'s health is:', bob.health)