from datetime import *
from dateutil.relativedelta import *

@add_method("hos.patient")
def get_age(self,ids,context={}):
    vals={}
    for obj in self.browse(ids):
        if obj.birth_date:
            age=relativedelta(datetime.today(),datetime.strptime(obj.birth_date,"%Y-%m-%d")).years
        else:
            age=None
        vals[obj.id]=age
    return vals

@add_method("hos.visit")
def set_done(self,ids,context={}):
    obj=self.browse(ids)[0]
    obj.write({"state":"done"})

@add_default("hos.visit","date")
def get_date(self,context={}):
    return datetime.today().strftime("%Y-%m-%d")