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Hello, all.
This code do not work.
When you tap , it will not work. (~~;;)
Any suggestion,please...

# coding: utf-8

import ui
import console

class MyTableView(object):
    def __init__(self):
        foods = [{'title': 'Vegitable'}, 
                 {'title': 'Fruits'}, 
                 {'title': 'Fish'}]
        self.list = ui.ListDataSource(foods)

        self.tv = ui.TableView()
        self.tv.name = 'Kind'
        self.tv.delegate = self.tv.data_source = self.list

        nv = ui.NavigationView(self.tv)
        nv.name = 'Foods'
        nv.present('sheet')

    def tableview_did_select(self, tableview, section, row):
        self.tv.name = self.list[row]['title']
        self.tv.delegate = self.tv.data_source = self.list
        table_view.navigation_view.push_view(self.tv)

    def tableview_number_of_sections(self, tableview):
        return 1

    def tableview_number_of_rows(self, tableview, section):
        return len(self.list)

    def tableview_cell_for_row(self, tableview, section, row):
        cell = ui.TableViewCell()
        cell.text_label.text = self.list
        return cell

### main ########################
MyTableView()

It doesn't work because the tableview delegate is set to ui.ListDataSource() instead of MyTableView.
I think you should use MyTableView as both the data source and as the delegate.
Maybe something like this?

# coding: utf-8

import ui
import console

class MyTableView(object):
    def __init__(self):
        self.list = [{'title': 'Vegitable'}, 
                 {'title': 'Fruits'}, 
                 {'title': 'Fish'}]

        self.tv = ui.TableView()
        self.tv.name = 'Kind'
        self.tv.delegate = self
        self.tv.data_source = self

        nv = ui.NavigationView(self.tv)
        nv.name = 'Foods'
        nv.present('sheet')

    def tableview_did_select(self, tableview, section, row):
        tv = ui.TableView()
        tv.name = self.list[row]['title']
        tv.delegate = self
        tableview.navigation_view.push_view(tv)

    def tableview_number_of_sections(self, tableview):
        return 1

    def tableview_number_of_rows(self, tableview, section):
        return len(self.list)

    def tableview_cell_for_row(self, tableview, section, row):
        cell = ui.TableViewCell()
        cell.text_label.text = self.list[row]['title']
        return cell

### main ########################
MyTableView()

@Sebastian
Thank you! It works,well!
And then, the sub menu was added to 'fruits'.
There may be a better way...

# coding: utf-8

import ui
import console

class MyTableView(object):
    def __init__(self):
        self.list = [{'title': 'Vegitable'}, 
                 {'title': 'Fruits'}, 
                 {'title': 'Fish'}]

        self.tv = ui.TableView()
        self.tv.name = 'Kind'
        self.tv.delegate = self
        self.tv.data_source = self

        nv = ui.NavigationView(self.tv)
        nv.name = 'Foods'
        nv.present('sheet')

    def tableview_did_select(self, tableview, section, row):
        tv = ui.TableView()
        tv.name = self.list[row]['title']

        if tv.name == 'Fruits':
            sub_ds = SubTableView()
            tv.data_source = sub_ds
            tv.delegate  = sub_ds
            tableview.navigation_view.push_view(tv)
        else:
            tv.delegate  = self
            tableview.navigation_view.push_view(tv)

    def tableview_number_of_sections(self, tableview):
        return 1

    def tableview_number_of_rows(self, tableview, section):
        return len(self.list)

    def tableview_cell_for_row(self, tableview, section, row):
        cell = ui.TableViewCell()
        cell.text_label.text = self.list[row]['title']
        return cell

class SubTableView(object):
    def __init__(self):
        self.fruits = [{'title': 'Banana'},
                            {'title': 'Orenge'},
                            {'title': 'Grape'}]

        self.tv = ui.TableView()
        self.tv.delegate = self
        self.tv.data_source = self

    def tableview_did_select(self, tableview, section, row):
        tv = ui.TableView()
        tv.name = self.fruits[row]['title']
        tv.delegate  = self
        tableview.navigation_view.push_view(tv)

    def tableview_number_of_sections(self, tableview):
        return 1

    def tableview_number_of_rows(self, tableview, section):
        return len(self.fruits)

    def tableview_cell_for_row(self, tableview, section, row):
        cell = ui.TableViewCell()
        cell.text_label.text = self.fruits[row]['title']
        return cell


### main ########################
MyTableView()