def setUp(self):
    self.browser=webdriver.Chrome()
    self.browser.get("http://www.awgp.org")

def test_image_ratio(self):

    self.image=self.browser.find_elements_by_xpath(".//img")
    for im in self.image:
        width, height= im.size
        print width, height

def tearDown(self):
    self.browser.quit()