def onAutoIndentTriggered(self):
        """Indent current line or selected lines
        """
        cursor = self._qpart.textCursor()

        startBlock = self._qpart.document().findBlock(cursor.selectionStart())
        endBlock = self._qpart.document().findBlock(cursor.selectionEnd())

        if startBlock != endBlock:  # indent multiply lines
            stopBlock = endBlock.next()

            block = startBlock

            with self._qpart:
                while block != stopBlock:
                    self.autoIndentBlock(block, '')
                    block = block.next()
        else:  # indent 1 line
            self.autoIndentBlock(startBlock, '')
def install_secret_key(app, filename='secret_key'):
    """Configure the SECRET_KEY from a file
    in the instance directory.

    If the file does not exist, print instructions
    to create it from a shell with a random key,
    then exit.
    """
    filename = os.path.join(app.instance_path, filename)

    try:
        app.config['SECRET_KEY'] = open(filename, 'rb').read()
    except IOError:
        print('Error: No secret key. Create it with:')
        full_path = os.path.dirname(filename)
        if not os.path.isdir(full_path):
            print('mkdir -p {filename}'.format(filename=full_path))
        print('head -c 24 /dev/urandom > {filename}'.format(filename=filename))
        sys.exit(1)