<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def ask_input(self, prompt):
 """Prompt user for input and return the entered value."""

        self._vim.command('call inputsave()')
        self._vim.command('let user_input = input("{} ")'.format(prompt))
        self._vim.command('call inputrestore()')
        response = self._vim.eval('user_input')
        self._vim.command('unlet user_input')
        return response