Load Country -> State -> City depencency in Odoo - odoo

Question

How can we create dependent selection of Country->State->City in Odoo?
For example -
Selected Country = United States
which will load All state of US
State = Texas, California, Ohio, .. etc,
Selected state = Texas
On Selection of State, it will load all Cities in selected state.
City = Austin, Huston, ..etc.
How can we achieve this in Odoo?
I have created below code in model.py
country = fields.Many2one('res.country',string='Country', help='Select Country')
state = fields.Many2one('state.country',string='State', help='Enter State')
city = fields.Char('City', help='Enter City')
view.xml file is having just below code:
<field name="country"/>
<field name="state"/>
<field name="city"/>

Answer 1

state_id = fields.Many2one("res.country.state", string='State', help='Enter State', ondelete='restrict')
country_id = fields.Many2one('res.country', string='Country', help='Select Country', ondelete='restrict')
city = fields.Char('City', help='Enter City')
hide = fields.Boolean(string='Hide', compute="_compute_hide")
# Dependent picklist code to show State based on selected Country E.g India -> Gujarat, Maharastra, Rajasthan, etc..
#api.onchange('country_id')
def _onchange_country_id(self):
if self.country_id:
return {'domain': {'state_id': [('country_id', '=', self.country_id.id)]}}
else:
return {'domain': {'state_id': []}}
# Show Hide State selection based on Country
#api.depends('country_id')
def _compute_hide(self):
if self.country_id:
self.hide = False
else:
self.hide = True
# view.xml
<field name="hide" invisible="1"/>
<field name="country_id" options="{'no_quick_create': True, 'no_create_edit' : True}"/>
<field name="state_id" options="{'no_quick_create': True, 'no_create_edit' : True}" attrs="{'invisible':[('hide', '=', True)]}"/>
<field name="city"/>