I try to get the Product template from selected Product Category. in my custom Model

prod_cate_ids=fields.Many2one('product.category', string="Product Category")

prod_templ=fields.Selection(selection='_get_prod_tem', string="Product Template", readonly=False)

@api.onchange('prod_cate_ids')def_get_prod_tem(self): 

​values=[]

​pro_tems=self.env['product.template'].search([('categ_id','=',self.prod_cate_ids.id)])

​if pro_tems is not None:

​for tem in pro_tems:

​ ​values.append([tem.id,tem.name])

​return values

Error log:

Traceback (most recent call last):
  File "C:\odoo16\server\odoo\http.py", line 1584, in _serve_db
    return service_model.retrying(self._serve_ir_http, self.env)
  File "C:\odoo16\server\odoo\service\model.py", line 133, in retrying
    result = func()
  File "C:\odoo16\server\odoo\http.py", line 1611, in _serve_ir_http
    response = self.dispatcher.dispatch(rule.endpoint, args)
  File "C:\odoo16\server\odoo\http.py", line 1815, in dispatch
    result = self.request.registry['ir.http']._dispatch(endpoint)
  File "C:\odoo16\server\odoo\addons\base\models\ir_http.py", line 154, in _dispatch
    result = endpoint(**request.params)
  File "C:\odoo16\server\odoo\http.py", line 697, in route_wrapper
    result = endpoint(self, *args, **params_ok)
  File "C:\odoo16\server\odoo\addons\web\controllers\dataset.py", line 42, in call_kw
    return self._call_kw(model, method, args, kwargs)
  File "C:\odoo16\server\odoo\addons\web\controllers\dataset.py", line 33, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "C:\odoo16\server\odoo\api.py", line 461, in call_kw
    result = _call_kw_multi(method, model, args, kwargs)
  File "C:\odoo16\server\odoo\api.py", line 448, in _call_kw_multi
    result = method(recs, *args, **kwargs)
  File "C:\odoo16\server\odoo\models.py", line 6502, in onchange
    record._onchange_eval(name, field_onchange[name], result)
  File "C:\odoo16\server\odoo\models.py", line 6214, in _onchange_eval
    process(method_res)
  File "C:\odoo16\server\odoo\models.py", line 6195, in process
    if res.get('value'):
AttributeError: 'list' object has no attribute 'get'

The above server error caused the following client error:
null