particle.py

# particle.py

import particle as p

class Particle(object):
    """A particle is a constituent unit of the universe.

    Attributes
    -----------
    c : charge in units of [e]
    m: mass in units of [kg]
    r: position in units of [meters]
    """


    roar = "I am a particle!" # an attribute

    # def __init__(self): # this is a constructor, a function that is a method; provides initial conditions
    #     """Initializes the particle with default values for
    #     charge c, mass m, and position r.
    #      """
    #     self.c = 0
    #     self.m = 0
    #     self.r = {'x': 0, 'y': 0, 'z': 0}

    def __init__(self, charge, mass, position):
        """Initializes the particles with supplied values for
        charge c, mass m, and position r.
        """
        self.c = charge
        self.m = mass
        self.r = position

    def hear_me(self): # this is a method
        myroar = self.roar + (
            " My charge is:     " + str(self.c) +
            " My mass is:       " + str(self.m) +
            " My x position is: " + str(self.r['x']) +
            " My y position is: " + str(self.r['y']) +
            " My z position is: " + str(self.r['z']))
        print(myroar)