update from atlas

01-data-model/vector2d.py

@@ -0,0 +1,24 @@
+from math import hypot
+
+class Vector:
+
+    def __init__(self, x=0, y=0):
+        self.x = x
+        self.y = y
+
+    def __repr__(self):
+        return 'Vector(%r, %r)' % (self.x, self.y)
+
+    def __abs__(self):
+        return hypot(self.x, self.y)
+
+    def __bool__(self):
+        return bool(abs(self))
+
+    def __add__(self, other):
+        x = self.x + other.x
+        y = self.y + other.y
+        return Vector(x, y)
+
+    def __mul__(self, scalar):
+        return Vector(self.x * scalar, self.y * scalar)