input: Write a function to design a python class to represent a 3-dimensional vector with methods to support vector addition and subtraction.
  
  assert Vector(1, 2, 3).addVec(Vector(5, 3, 2)).printVec()==None
  assert Vector(1, 2, 3).subVec(Vector(5, 3, 2)).printVec()==None
  assert Vector(4, 4, 4).addVec(Vector(1, 1, 1)).printVec()==None
  assert Vector(4, 4, 4).subVec(Vector(1, 1, 1)).printVec()==None
  assert Vector(0, 0, 0).addVec(Vector(0, 0, 0)).printVec()==None
  assert Vector(0, 0, 0).subVec(Vector(0, 0, 0)).printVec()==None
output: class Vector:
      def __init__(self, x, y, z):
          self.x = x
          self.y = y
          self.z = z
  
      def addVec(self, other):
          return Vector(self.x + other.x, self.y + other.y, self.z + other.z)
  
      def subVec(self, other):
          return Vector(self.x - other.x, self.y - other.y, self.z - other.z)
  
      def printVec(self):
          print(f"({self.x}, {self.y}, {self.z})")
          return None