title: python error: method takes exactly 1 argument (2 given)
body: <p>I have a little problem in my python program, I am working in wxpython and I am trying to open a pipe in read mode via a button that is tied to a function "checkpipe" via an event. The problem is that when I click the button, the python error interpreter tells me this:</p>
  
  <pre><code>class fenetre(wx.Frame): #on va creer une nouvelle classe pour l'interface
      def __init__(self, parent, id): #constructeur
          filecontent = ""
          wx.Frame.__init__(self, parent, id, 'Solution 1 ---&gt; Destinataire', size = (640,480))
          panel = wx.Panel(self)
          verifybutton = wx.Button(panel,label = "Verifier", pos = (320,10), size = (80,30))
          self.currentDirectory = os.getcwd() #trouver le chemin du dossier dans lequel on se trouve
          self.Centre() #faire apparaitre la fenetre au centre
          textprocessid = wx.StaticText(panel, -1, monid, pos = (400, 213))
          self.Bind(wx.EVT_BUTTON, self.checkpipe, verifybutton)
  
  
      def alertMessagePipeEmpty(self):
          dialog = wx.MessageDialog(self, "Rien recu. Veuillez essayer plus tard","Erreur", wx.OK|wx.ICON_ERROR)
          result = dialog.ShowModal()
          dialog.Destroy()
  
      def closewindow(self, event):
          self.Destroy()
  
      def checkpipe(self,names = None):
          if not os.path.exists(fifoname):
              os.mkfifo(fifoname)
          pipein = open(fifoname, 'r') 
          contenu = pipein.read()
          if contenu == "":
              self.alertMessagePipeEmpty()
          else:
              dialog = wx.MessageDialog(self, "Vous avez un fichier a recevoir. Voulez-vous le sauvegarder","Fichier recu", wx.YES_DEFAULT|wx.ICON_ERROR)
              result = dialog.ShowModal()
              dialog.Destroy()
              if result == wx.ID_YES:
                  dlg = wx.FileDialog(
                  self, message="Sauvegardez le fichier",
                  defaultDir=self.currentDirectory,
                  defaultFile="",
                  wildcard=wildcard,
                  style=wx.SAVE | wx.CHANGE_DIR
                  )
                  if dlg.ShowModal() == wx.ID_OK:
                      paths = dlg.GetPaths()
                      pathcomplet = ""
                      for path in paths:
                          pathcomplet = pathcomplet + path
                  dlg.Destroy()
                  fd2 = open(pathcomplet,'w')
                  fd2.write(contenu)
                  os.unlink(fifoname)
  
  if __name__ == '__main__':
      app = wx.PySimpleApp()
      frame = fenetre(parent = None, id = -1)
      frame.Show()
      app.MainLoop()
  </code></pre>
  
  <p>TypeError: checkpipe() takes exactly 1 argument (2 given)</p>
  
  <p>I tried everything, I guess it is about something stupid that I am missing, but I cannot seem to figure it out. Any help would be appreciated.</p>