How can override a field default value with default_get in odoo9? - odoo

Question

I want to override the default value for a field with the default_get API function in odoo9.
I have this in my code:
#api.model
def default_get(self, fields_list):
res = super(hr_attendance, self).default_get(fields_list)
res.update({
'animal': 'dog'
})
return res
When I create a new register, this error appears in the odoo log:
2016-09-02 11:33:36,680 27542 ERROR mydb openerp.http: Exception during JSON request handling.
Traceback (most recent call last):
File "/etc/odoo/server/openerp/http.py", line 648, in _handle_exception
return super(JsonRequest, self)._handle_exception(exception)
File "/etc/odoo/server/openerp/http.py", line 685, in dispatch
result = self._call_function(**self.params)
File "/etc/odoo/server/openerp/http.py", line 321, in _call_function
return checked_call(self.db, *args, **kwargs)
File "/etc/odoo/server/openerp/service/model.py", line 118, in wrapper
return f(dbname, *args, **kwargs)
File "/etc/odoo/server/openerp/http.py", line 314, in checked_call
result = self.endpoint(*a, **kw)
File "/etc/odoo/server/openerp/http.py", line 964, in __call__
return self.method(*args, **kw)
File "/etc/odoo/server/openerp/http.py", line 514, in response_wrap
response = f(*args, **kw)
File "/etc/odoo/server/addons/web/controllers/main.py", line 888, in call_kw
return self._call_kw(model, method, args, kwargs)
File "/etc/odoo/server/addons/web/controllers/main.py", line 880, in _call_kw
return getattr(request.registry.get(model), method)(request.cr, request.uid, *args, **kwargs)
File "/etc/odoo/server/openerp/api.py", line 250, in wrapper
return old_api(self, *args, **kwargs)
File "/etc/odoo/server/openerp/api.py", line 354, in old_api
result = method(recs, *args, **kwargs)
File "/etc/odoo/server/addons_extra/hr_attendance_extend/hr_attendance.py", line 79, in default_get
res.update({
AttributeError: 'tuple' object has no attribute 'update'
What I am doing wrong?
Edit: I had another variable with the same name which provoqued conflict.
Renaming the variable, everything works perfect.

Answer 1

update is a method of dictionary data-type. And you are trying to use it with tuple data-type. That's reason you got error.
Try with following code:
#api.model
def default_get(self, fields):
res = super(hr_attendance, self).default_get(fields)
res['animal'] = 'dog'
return res