# -*- coding: utf-8 -*-
from odoo import models, fields, api
class TodoTask(models.Model):
    _name = 'todo.task'
    _description = 'To-do Task'
    name = fields.Char('Description', required=True)
    is_done = fields.Boolean('Done?')
    active = fields.Boolean('Active', default=True)

    @api.multi
    def do_toggle_done(self):
        for task in self:
            task.is_done = not task.is_done
        return True

    @api.model
    def do_clear_done(self):
        dones = self.search([('is_done', '=', True)])
        dones.write({'active': False})
        return True
and getting Error is 
Traceback (most recent call last):
  File "/home/odoo10/odoo-dev/odoo/odoo/http.py", line 638, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/home/odoo10/odoo-dev/odoo/odoo/http.py", line 675, in dispatch
    result = self._call_function(**self.params)
  File "/home/odoo10/odoo-dev/odoo/odoo/http.py", line 331, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/home/odoo10/odoo-dev/odoo/odoo/service/model.py", line 119, in wrapper
    return f(dbname, *args, **kwargs)
  File "/home/odoo10/odoo-dev/odoo/odoo/http.py", line 324, in checked_call
    result = self.endpoint(*a, **kw)
  File "/home/odoo10/odoo-dev/odoo/odoo/http.py", line 933, in __call__
    return self.method(*args, **kw)
  File "/home/odoo10/odoo-dev/odoo/odoo/http.py", line 504, in response_wrap
    response = f(*args, **kw)
  File "/home/odoo10/odoo-dev/odoo/addons/web/controllers/main.py", line 882, in call_button
    action = self._call_kw(model, method, args, {})
  File "/home/odoo10/odoo-dev/odoo/addons/web/controllers/main.py", line 870, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/home/odoo10/odoo-dev/odoo/odoo/api.py", line 679, in call_kw
    return call_kw_model(method, model, args, kwargs)
  File "/home/odoo10/odoo-dev/odoo/odoo/api.py", line 662, in call_kw_model
    recs = self.with_context(context or {})
  File "/home/odoo10/odoo-dev/odoo/odoo/models.py", line 4865, in with_context
    context = dict(args[0] if args else self._context, **kwargs)
TypeError: cannot convert dictionary update sequence element #0 to a sequence