Rename folder, add new exercise file, comment out tests and import class Point into new file

thinkcspy/Chapter-17-18-Exercises/points.py

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+import math
+
+class Point:
+    """ Point class for representing and manipulating x,y coordinates. """
+
+    def __init__(self, initX, initY):
+        """ Create a new point at the given coordinates. """
+        self.x = initX
+        self.y = initY
+
+    def getX(self):
+        return self.x
+
+    def getY(self):
+        return self.y
+
+    def distanceFromOrigin(self):
+        return ((self.x ** 2) + (self.y ** 2)) ** 0.5
+    
+    def distanceFromPoint(self, pnt):
+        dx = self.x - pnt.getX()
+        dy = self.y - pnt.getY()
+        
+        return math.sqrt(dx**2 + dy**2)
+    
+    def reflect_x(self):
+        return (self.x, -self.y)
+    
+    def slopeFromOrigin(self):
+        return self.y / self.x
+    
+    def slopeIntercept(self, pnt):
+        dx = self.x - pnt.getX()
+        dy = self.y - pnt.getY()
+        
+        # Accounting for points of failure (divide by 0)
+        if dx == 0:
+            if dy == 0:
+                return "Error: Cannot calculate slope of a single point."
+            else:
+                return "Error: Cannot calculate slope of a vertical line."
+        
+        m = dy / dx
+        b = self.y - m*self.x
+        
+        return (m, b)
+    
+    def getMid(self, pnt):
+        midX = (self.x + pnt.getX()) / 2
+        midY = (self.y + pnt.getY()) / 2
+        
+        return (midX, midY) 
+    
+    def findCenterRadius(self, pnt1, pnt2):
+        # Find a way to figure out if all three points are on the same line probably
+        # Comparing slopeIntercept return values
+        m1, b1 = self.slopeIntercept(pnt1)
+        m2, b2 = self.slopeIntercept(pnt2)
+        
+        if m1 == m2 and b1 == b2:
+            return "Error: Points are on the same line."
+        
+        mid1X, mid1Y = self.getMid(pnt1)
+        mid2X, mid2Y = self.getMid(pnt2)
+        center = Point(mid1X, mid1Y).getMid(Point(mid2X, mid2Y))
+        
+        r = self.distanceFromPoint(Point(center[0], center[1]))
+        
+        return "Circumcenter: {}; Radius: {}".format(center, r)
+        
+    def move(self, pnt):
+        self.x += pnt.getX()
+        self.y += pnt.getY()
+        
+        return (self.x, self.y)
+
+    def __str__(self):
+        return "x=" + str(self.x) + ", y=" + str(self.y)
+
+# p = Point(7, 6)
+# q = Point(10, 3)
+# z = Point(8, 5)
+# print(p.findCenterRadius(q, z))

thinkcspy/Chapter-17-18-Exercises/rectangle.py

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+from points import Point
+
+a = Point(5, 6)
+print(a)