Added vector2

Author: Citrus716

3_advanced/chapter13/examples/vector2.py

@@ -0,0 +1,50 @@
+class Vector:
+	"""
+	Constructor
+ 
+	self: a reference to the object we are creating
+	vals: a list of integers which are the contents of our vector
+	"""
+	def __init__(self, vals):
+		self.vals = vals
+		# print("Assigned values ", vals, " to vector.")
+ 
+	"""
+	String Function
+ 
+	Converts the object to a string in readable format for programmers
+	"""
+	def __str__(self):
+		return str(self.vals)
+ 
+	"""
+        Elementwise power: raises each element in our vector to the given power
+        """
+	def __pow__(self, power):
+		return Vector([i**power for i in self.vals])
+ 
+	"""
+        Addition: adds each element to corresponding element in other vector
+        """
+	def __add__(self, vec):
+		return Vector([self.vals[i] + vec.vals[i] for i in range(len(self.vals))])
+ 
+	"""
+        Multiplies each element in the vector by a specified constant
+        """
+	def __mul__(self, constant):
+		return Vector([self.vals[i] * constant for i in range(len(self.vals))])
+ 
+	"""
+        Elementwise subtraction: does the same as addition, just subtraction instead
+        """
+	def __sub__(self, vec):
+		return self + (vec * (-1))
+ 
+vec = Vector([2, 3, 2])
+otherVec = Vector([3, 4, 5])
+print(str(vec)) # [2, 3, 2]
+print(vec ** 2) # [4, 9, 4]
+print(vec - otherVec) # [-1, -1, -3]
+print(vec + otherVec) # [5,  7, 7]
+print(vec * 5) # [10, 15, 10]