I am unable to get the correct output from my code

import math

class Shape:
    """Shape class: provides three methods:

       1.   __init__()  set initial x,y coordinates
       2.   move()      changes x,y coordinates
       3.   location()  returns x,y coordinates 

       The __str__() method is customized to show an object's class and x,y coordinates.

       You have to complete the location() method."""

    # __init__() is the constructor
    # Instance methods always have a "self" parameter.
    def __init__(self, x, y):
        """Assign x,y coordinates to the object"""
        self.x = x
        self.y = y


    def move(self, deltaX, deltaY):
        """Moves Shape object by adding values to the object's x and y coordinates."""
        self.x = self.x + deltaX
        self.y = self.y + deltaY


    # Custom __str__() method to report an objects properties
    # Every class inherits a __str__() method for the top-level Object class.
    # We can modify it to produce more descriptive output for this class.
    def __str__(self):
        """Return class name, x, and y"""
        return "{}, x:{}, y:{}".format(type(self).__name__, self.x, self.y)


    def location(self):
        tup = (self.x, self.y)
        return tup

import math
from shape import *

class Circle(Shape):
    """The Quick Python Book"""
    pi = 3.14159265359
    def __init__(self, x=0, y=0, radius=1):
        Shape.__init__(self, x, y)
        self.radius = radius

    def area(self):
        return  Circle.pi * self.radius ** 2

    def __str__(self):
        return Shape.__str__(self) + ", radius: {radius}, area: {area}".format(radius=self.radius, area = self.area())

    # Class methods are declared using the @classmethod keyword
    # "cls" is a standin for MyClass.
    @classmethod
    def is_collision(self,c1,c2):
        a = self.distance(c1,c2)
        if a <= (c1.radius + c2.radius):
            return True
        return None

    @classmethod
    def distance(self,c1,c2):
        a = c1.location()
        b = c2.location()
        return math.sqrt(( (a[0] - b[0]) * (a[0] - b[0]) +(a[1] - b[1]) * (a[1] - b[1]) ))

import math

from shape import Shape
from circle import Circle

print('''
#########################
week8.16.plaintext.py
#########################
''')

print("""Testing Circle class for area(), move(), location()""")

# Initial x,y coordinates
i2 = 0
x1 = 0
y1 = 0
x2 = 0
y2 = 0

c1 = Circle(100, 0, 20)
c2 = Circle(200, 0, 20) 

c1_o_loc = c1.__str__()
c2_o_loc = c2.__str__()

print("""Starting with two circles:
Circle One: {}
Circle Two: {}
Minimum distance between their centers: {}""".format(c1_o_loc,c2_o_loc, 40))

print("""
|============================================================|                         
| Num |   x1 |  y1  |  x2  |  y2  |  Distance  | Collision?  |
|============================================================|""")                         


for i in range(1,31):
    template = """| {count:>3} | {x1_val:>4} | {y1_val:>4} | {x2_val:>4} | {y2_val:>4} | {distance:>10.2f} |    {collision}     |"""

    # Get the x,y coordinates of both circles
    c1_x = c1.location()[0]
    c1_y = c1.location()[1]
    c2_x = c2.location()[0]
    c2_y = c2.location()[1]

    # print each line of data using a template
    print(template.format(count=i,x1_val=c1_x,y1_val=c1_y,x2_val=c2_x,y2_val=c2_y, 
	distance=Circle.distance(c1,c2), collision=Circle.is_collision(c1,c2)))
    print("|------------------------------------------------------------|")
    # Change directions now and then for circle 1
    if i < 15:
        x1 = 20 * i + 100
    else:
        x1 = 300 + ((18 - i) * 20)

    # Circle 2 follows a sine wave.
    y1 = 35 * i   
    x1 = int(i + x1**1.2)
    y2 = int(x1**1.19)
    x2 = int( 35 * math.sin(i**0.99) + 200 )
    y2 = 35 * i

    c1.move(x1, y1)
    c2.move(x2, y2)

y1 = 35 * i   
    x1 = int(i + x1**1.2)
    y2 = int(x1**1.19)
    x2 = int( 35 * math.sin(i**0.99) + 200 )
    y2 = 35 * i

#########################
lab8.16.py
#########################

Testing Circle class for area(), move(), location(), __str__()
Starting with two circles:
Circle One: This is a Circle at x,y locations 100, 0 and radius 20.
Circle Two: This is a Circle at x,y locations 200, 0 and radius 20.
Minimum distance between their centers: 40

|============================================================|                         
| Num |   x1 |  y1  |  x2  |  y2  |  Distance  | Collision?  |
|============================================================|
|   1 |  100 |    0 |  200 |    0 |     100.00 |    None     |
|------------------------------------------------------------|
|   2 |  120 |   35 |  229 |   35 |     109.00 |    None     |
|------------------------------------------------------------|
|   3 |  140 |   70 |  232 |   70 |      92.00 |    None     |
|------------------------------------------------------------|
|   4 |  160 |  105 |  206 |  105 |      46.00 |    None     |
|------------------------------------------------------------|
|   5 |  180 |  140 |  174 |  140 |       6.00 |    True     |
|------------------------------------------------------------|
|   6 |  200 |  175 |  165 |  175 |      35.00 |    True     |
|------------------------------------------------------------|
|   7 |  220 |  210 |  186 |  210 |      34.00 |    True     |
|------------------------------------------------------------|
|   8 |  240 |  245 |  219 |  245 |      21.00 |    True     |
|------------------------------------------------------------|
|   9 |  260 |  280 |  234 |  280 |      26.00 |    True     |
|------------------------------------------------------------|
|  10 |  280 |  315 |  220 |  315 |      60.00 |    None     |
|------------------------------------------------------------|
|  11 |  300 |  350 |  188 |  350 |     112.00 |    None     |
|------------------------------------------------------------|
|  12 |  320 |  385 |  166 |  385 |     154.00 |    None     |
|------------------------------------------------------------|

#########################
week8.16.plaintext.py
#########################

Testing Circle class for area(), move(), location()
Starting with two circles:
Circle One: Circle, x:100, y:0, radius: 20, area: 1256.637061436
Circle Two: Circle, x:200, y:0, radius: 20, area: 1256.637061436
Minimum distance between their centers: 40

|============================================================|                         
| Num |   x1 |  y1  |  x2  |  y2  |  Distance  | Collision?  |
|============================================================|
|   1 |  100 |    0 |  200 |    0 |     100.00 |    None     |
|------------------------------------------------------------|
|   2 |  413 |   35 |  429 |   35 |      16.00 |    True     |
|------------------------------------------------------------|
|   3 |  791 |  105 |  661 |  105 |     130.00 |    None     |
|------------------------------------------------------------|
|   4 | 1235 |  210 |  867 |  210 |     368.00 |    None     |
|------------------------------------------------------------|
|   5 | 1747 |  350 | 1041 |  350 |     706.00 |    None     |
|------------------------------------------------------------|
|   6 | 2329 |  525 | 1206 |  525 |    1123.00 |    None     |
|------------------------------------------------------------|
|   7 | 2982 |  735 | 1392 |  735 |    1590.00 |    None     |
|------------------------------------------------------------|
|   8 | 3707 |  980 | 1611 |  980 |    2096.00 |    None     |
|------------------------------------------------------------|
|   9 | 4505 | 1260 | 1845 | 1260 |    2660.00 |    None     |
|------------------------------------------------------------|
|  10 | 5378 | 1575 | 2065 | 1575 |    3313.00 |    None     |
|------------------------------------------------------------|
|  11 | 6326 | 1925 | 2253 | 1925 |    4073.00 |    None     |
|------------------------------------------------------------|
|  12 | 7351 | 2310 | 2419 | 2310 |    4932.00 |    None     |
|------------------------------------------------------------|