select * from customers where age=<age> AND name=<name>

import unittest
    class TestSelectFromCustomers(unittest.TestCase):
      def test_select(self):
        self.assertEqual(select_from_customers(42, 'Carlos', [{'id': 1, 'name': 'Carlos', 'age': 42}, {'id': 2, 'name': 'Dani', 'age': 44}]), {'id': 1, 'name': 'Carlos', 'age': 42})