当运行我的程序时，我收到一条消息，上面写着；Python REPL进程已退出；这是否正常？

我正在运行下面所附的程序，每当我在Microsoft Visual Studio Ultimate 2013中运行它时，我都会收到以下消息：Python REPL进程已退出。一般来说，我对python和编程非常陌生。程序按预期运行，但这条消息让我担心。这是否正常？如果这不正常，请告诉我如何修复。我使用本机pythonidle运行它，没有收到任何错误，但仍然怀疑这是否会导致以后出现问题。我只是想知道如果我扩展这段代码，VisualStudio是否会试图警告我可能发生的事情。命令行只提供程序的输出

from PIL import Image

class PixelCounter(object):
  ''' loop through each pixel and average rgb '''
  def __init__(self, imageName):
      self.pic = Image.open(imageName)
      #Opens image
      self.imgData = self.pic.load()
      # load image data
  def averagePixels(self):
      r, g, b = 0, 0, 0
      count = 0
      # Declares variables and sets them to 0 to be modified later
      for x in range(self.pic.size[0]):
          for y in range(self.pic.size[1]):
              tempr,tempg,tempb = self.imgData[x,y]
              r += tempr
              g += tempg
              b += tempb
              count += 1
              # Adds the rgb values of each pixel to the total r, g, b values
      ravg = r/count
      gavg = g/count
      bavg = b/count
      # calculates averages
      round(ravg)
      round(gavg)
      round(bavg)
      # Rounds numbers
      # print("R: ", ravg, ", G: ", gavg, ", B: ", bavg,", Total Pixels: ", count)
      # return (r/count), (g/count), (b/count), count

if __name__ == '__main__':
  # assumes you have a test.jpg in the working directory! 

  pc = PixelCounter("test.jpg")
  #print ("red, green, blue, total_pixel_count")
  print("R: ", ravg, ", G: ", gavg, ", B: ", bavg,", Total Pixels: ", count)
  #pc.averagePixels()

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试着从命令行运行它，看看它会出现什么错误（可能不会出现任何错误）。我使用本机python idle运行它，没有收到任何错误，但仍然怀疑这是否会导致以后出现问题。我只是想知道如果我扩展这段代码，VisualStudio是否会试图警告我可能发生的事情。命令行只提供程序的输出。