show_loading

def show_loading(parent, title, message=None, maximum=100):
    if not message:
        message = title

    # A class for the return value.
    class LoadingObject(object):
        def __init__(self, dialog):
            self.dialog = dialog
            self.is_done = False

        def done(self):
            if not self.is_done:
                self.dialog.Destroy()
                self.is_done = True

        def pulse(self, message):
            self.dialog.Pulse(message)

        def progress(self, current, message=None):
            if current >= maximum:
                current = current - 1

            if message is not None:
                self.dialog.Update(current, message)
            else:
                self.dialog.Update(current)

    # Create the progress dialog.
    dlg_style = wx.PD_APP_MODAL | wx.PD_ELAPSED_TIME | wx.PD_REMAINING_TIME
    dlg = wx.ProgressDialog(
        title, message, parent=parent, style=dlg_style, maximum=maximum
    )
    dlg.Pulse()

    # Return an instance of the LoadingDialog with the progress dialog attached.
    return LoadingObject(dlg)