title: Application name in kivy
body: <p>I have two applications with one kv file. Between both  applications is different only in app class name. Application A gives good result, but application B is bad. Where is problem?</p>
  
  <p>application A:</p>
  
  <pre><code>import kivy
  kivy.require('1.0.5')
  from kivy.lang.builder import Builder
  
  from kivy.uix.button import Button
  from kivy.uix.gridlayout import GridLayout
  from kivy.app import App
  
  class MyW(GridLayout):
      pass
  
  class ShowApp(App):
  def build(self):
      Builder.load_file('d:\\MyPgm\\Python\\kivy\\ControlShow    \\ControlShow.kv')
      return MyW()
  
  
  if __name__ == '__main__':
      ShowApp().run()
  </code></pre>
  
  <p>application B:</p>
  
  <pre><code>import kivy
  kivy.require('1.0.5')
  from kivy.lang.builder import Builder
  
  from kivy.uix.button import Button
  from kivy.uix.gridlayout import GridLayout
  from kivy.app import App
  
  class MyW(GridLayout):
      pass
  
  class ControlShowApp(App):
  def build(self):
      Builder.load_file('d:\\MyPgm\\Python\\kivy\\ControlShow    \\ControlShow.kv')
      return MyW()
  
  
  if __name__ == '__main__':
      ControlShowApp().run()
  </code></pre>
  
  <p>KV file:</p>
  
  <pre><code>&lt;MyW&gt;
      cols: 2
      rows: 2
      Button:
        id: label1
        text: 'B1'
      Button:
        id: label2
        text: 'B2'
      Button:
        id: label3
        text: 'B3'
      Button:
        id: label4
        text: 'B4'
  </code></pre>