Here is the field information but it doesn't displayed in the web page
'type': fields.selection([('country','Country'),('state','State')],'Type'),
In my view the field is
<field name="type"/>
I don't quite see anything wrong with your code. There might be something else that's causing your problem. However you can try alter your code a bit: Declare the selection as a global variable outside the class:
choice = (('country','Country'),('state','State'))
Then in your class:
'type_': fields.selection(choice,string='Type'),
Your xml is ok, but you can try adding the widget="selection":
<field name="type_" widget="selection"/>
Note that I renamed your field to type_, type might be reserved.