__dirname should do fine.

sample-code/examples/python/simple_real_device.py

@@ -0,0 +1,51 @@
+"""Be sure to use the latest selenium version
+as there might be some problems with JSON serialization
+
+Before running the test make sure you started appium server
+with TestApp app: grunt appium:TestApp
+"""
+import unittest
+import os
+from random import randint
+from selenium import webdriver
+
+
+class TestSequenceFunctions(unittest.TestCase):
+
+    def setUp(self):
+        # set up appium
+        app = "io.appium.TestApp"
+        self.driver = webdriver.Remote(
+            command_executor='http://127.0.0.1:4723/wd/hub',
+            desired_capabilities={
+                'browserName': 'iOS',
+                'platform': 'Mac',
+                'version': '6.0',
+                'app': app
+            })
+        self._values = []
+
+    def _populate(self):
+        # populate text fields with two random number
+        elems = self.driver.find_elements_by_tag_name('textField')
+        for elem in elems:
+            rndNum = randint(0, 10)
+            elem.send_keys(rndNum)
+            self._values.append(rndNum)
+
+    def test_ui_computation(self):
+        # populate text fields with values
+        self._populate()
+        # trigger computation by using the button
+        buttons = self.driver.find_elements_by_tag_name("button")
+        buttons[0].click()
+        # is sum equal ?
+        texts = self.driver.find_elements_by_tag_name("staticText")
+        self.assertEqual(int(texts[0].text), self._values[0] + self._values[1])
+
+    def tearDown(self):
+        self.driver.quit()
+
+
+if __name__ == '__main__':
+    unittest.main()