wait = WebDriverWait(driver, 10)
...
albums = wait.until(EC.presence_of_all_elements_located((By.CSS_SELECTOR, ".albums .album img")))
        albumslength = len(albums)-1
        while albumslength > 0:
            wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, ('.album:nth-child('+str(albumslength)+') img[src*="album-foo"]'))))
            albumslength -= 1
...

Boolean loaded = false;

WebDriver driver = new AnyDriverYouWant();
JavascriptExecutor js;
if (driver instanceof JavascriptExecutor) {
    js = (JavascriptExecutor)driver;
}
loaded = (Boolean)js.executeScript("image.onload(function() { return true; });");