title: TypeError: integer argument expected, got float
body: <p>This is my first time asking a question on Stack Overflow so I apologize in advance if my question is too vague or if not enough information is provided.</p>
  
  <p>Basically the problem I am having is that my code will not run due to a TypeError.</p>
  
  <p>Here is the exact message:</p>
  
  <pre><code>Traceback (most recent call last):
    File "C:\Program Files (x86)\Wing IDE 101 4.0\src\debug\tserver\_sandbox.py", line 61, in &lt;module&gt;
    File "C:\pygamehelper.py", line 62, in mainLoop
    File "C:\Program Files (x86)\Wing IDE 101 4.0\src\debug\tserver\_sandbox.py", line 54, in draw
  TypeError: integer argument expected, got float
  </code></pre>
  
  <p>So I think that the error is occurring due to the tuple associated with pos being converted to a vector using the vec2d method, and then being passed as an argument (as a float) to the draw.circle method in line 54, where an int is being expected. This is how it was done in the tutorial that I am following however, and his code is identical and executed without problems.</p>
  
  <p>Could it possibly be due to him using a different version of Python, or PyGame, or is there something wrong with my code?</p>
  
  <p>Thanks in advance for your help.</p>
  
  <pre><code>from pygamehelper import *
  from pygame import *
  from pygame.locals import *
  from vec2d import *
  from math import e, pi, cos, sin, sqrt
  from random import uniform
  
  class Agents:
      def __init__(self):
          self.pos = vec2d(0, 0)
          self.target = vec2d(0, 0)
  
  class Starter(PygameHelper):
      def __init__(self):
          self.w, self.h = 800, 600
          PygameHelper.__init__(self, size=(self.w, self.h), fill=((255,255,255)))
  
          self.agents = []
  
          for i in range(10):
              a = Agents()
              a.pos = vec2d(uniform(0, self.w), uniform(0, self.h))
              a.target = vec2d(uniform(0, self.w), uniform(0, self.h))
              self.agents.append(a)
  
      def update(self):
  
          for a in self.agents:
  
              dir = a.target - a.pos
              dir.length = 5
              a.pos = a.pos + dir
  
      def keyUp(self, key):
          pass
  
      def mouseUp(self, button, pos):
  
          for a in self.agents:
              a.target = vec2d(pos)
  
      def mouseMotion(self, buttons, pos, rel):
          pass
  
      def draw(self):
  
          # clear the screen 40 times / sec so that only 1 char and target
          # present on screen at a time
          self.screen.fill((255,255,255))
  
  
          for a in self.agents:
              # character
              pygame.draw.circle(self.screen, (200, 200, 255), a.pos, 10)
              # black character outline
              pygame.draw.circle(self.screen, (0, 0, 0), a.pos, 11, 1)
              # target
              pygame.draw.circle(self.screen, (200, 0, 0), a.target, 20, 1)
  
  s = Starter()
  s.mainLoop(40)
  </code></pre>