Fix code style issues with Black

Author: lint-action

3_advanced/chapter13/examples/vector2.py

@@ -1,50 +1,59 @@
 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.")
- 
-	"""
+    """
+    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)
- 
-	"""
+
+    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])
- 
-	"""
+
+    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))])
- 
-	"""
+
+    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))])
- 
-	"""
+
+    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))
- 
+
+    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]
+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]