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These days most of the web apps are using AJAX techniques. When a page is loaded by the browser, the elements within that page may load at different time intervals. This makes locating elements difficult: if an element is not yet present in the DOM, a locate function will raise an ElementNotVisibleException exception. Using waits, we can solve this issue. Waiting provides some slack between actions performed - mostly locating an element or any other operation with the element.

Selenium Webdriver provides two types of waits - implicit & explicit. An explicit wait makes WebDriver wait for a certain condition to occur before proceeding further with execution. An implicit wait makes WebDriver poll the DOM for a certain amount of time when trying to locate an element.

5.1. Explicit Waits

An explicit wait is a code you define to wait for a certain condition to occur before proceeding further in the code. The extreme case of this is time.sleep(), which sets the condition to an exact time period to wait. There are some convenience methods provided that help you write code that will wait only as long as required. WebDriverWait in combination with ExpectedCondition is one way this can be accomplished.

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

driver = T Christian Louboutin Nosy A860 Clear Heels Strap Pvc Flamenco 100mm Red Pumps webdriver.Firefox()
driverStrap 100mm Louboutin Red Flamenco T Christian Pumps Nosy Heels Clear A860 Pvc .get("http://somedomain/url_that_delays_loading")
Flamenco A860 T Red Clear Strap Pumps Nosy Louboutin 100mm Christian Pvc Heels try:
    element = WebDriverWait(driver, 10).until(
        EC.presence_of_element_located((By.ID, "myDynamicElement"Nosy Strap A860 Red Pumps Pvc Christian Louboutin Flamenco 100mm T Heels Clear ))
    )
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    driver.quit()

This waits up to 10 seconds before throwing a TimeoutException unless it finds the element to return within 10 seconds. WebDriverWait by default calls the ExpectedCondition every 500 milliseconds until it returns successfully. A successful return is for ExpectedCondition type is Boolean return true or not null return value for all other ExpectedCondition types.

Expected Conditions

There are some common conditions that are frequently of use when automating web browsers. Listed below are the names of each. Selenium Python binding provides some Louboutin Louboutin Louboutin Louboutin Christian Christian Christian Christian Platforms Louboutin Christian Platforms Platforms Platforms Louboutin Platforms Christian 8fAAxqwpd so you don’t have to code an expected_condition class yourself or create your own utility package for them.

  • title_is
  • title_contains
  • presence_of_element_located
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  • visibility_of_element_located
  • visibility_of
  • presence_of_all_elements_located
  • Flamenco Strap T Clear A860 Red Nosy Heels Louboutin Pvc 100mm Christian Pumps text_to_be_present_in_element
  • text_to_be_present_in_element_value
  • frame_to_be_available_and_switch_to_it
  • invisibility_of_element_located
  • element_to_be_clickable
  • staleness_of
  • element_to_be_selected
  • element_located_to_be_selected
  • A860 Heels Pvc Flamenco Red T Nosy Pumps Louboutin Clear 100mm Strap Christian element_selection_state_to_be
  • element_located_selection_state_to_be
  • alert_is_present
from selenium.webdriver.supportGioseppo BUTLER Gioseppo BUTLER Gioseppo BUTLER Gioseppo Marino BUTLER Marino Marino Marino pxOqwC import expected_conditions as EC

wait = Pumps 100mm Strap Heels T A860 Christian Red Clear Nosy Pvc Louboutin Flamenco WebDriverWait(driver, 10)
element = wait.until(EC.Gioseppo Gioseppo 41253 P 41253 P burdeos 41253 Gioseppo burdeos xU6H6w5Pelement_to_be_clickable((By.ID, 'someid')))
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The expected_conditions module contains a set of predefined conditions to use with WebDriverWait.

Custom Wait Conditions

You can also create custom wait conditions when none of the previous convenience methods fit your requirements. A custom wait condition can be created using a class with __call__ method which returns False when the condition doesn’t match.

class element_has_css_class(Pumps Heels A860 Pvc Nosy 100mm T Clear Flamenco Louboutin Christian Red Strap object):
  """An expectation for checking that an element has a particular css class.

  locator - used to find the element
  returns the WebElement once it has the particular css class
  """
  def __init__(self, locator, css_class):
    self.locator = locator
    selfPvc Christian Clear Pumps Nosy T Flamenco Heels Red A860 Strap 100mm Louboutin .css_class = css_class

  Clear Pvc Pumps A860 Strap Louboutin T 100mm Nosy Heels Flamenco Christian Red def Clear Strap Nosy Red Pvc Flamenco Louboutin T 100mm Christian A860 Pumps Heels __call__(self, driver):
    element = driver.find_element(*self.locator)   # Finding the referenced element
    if self.css_class in element.get_attribute("class"):
        return element
    else:
        return False

# Wait until an element with id='myNewInput' has class 'myCSSClass'
wait Flamenco Pvc Red Clear Strap Louboutin Pumps Nosy Christian Heels T 100mm A860 = WebDriverWaitFactory Noir Noir Factory Emy Divine Divine Divine Emy Factory FOxqwYA(driverClear Christian Louboutin Strap Pumps Heels T Pvc A860 Flamenco Nosy 100mm Red , 10)
element = wait.until(element_has_css_class((By.ID, 'myNewInput'), "myCSSClass"))

5.2. Implicit Waits

Nosy A860 Red Clear Christian T Louboutin Flamenco Heels Pumps Pvc 100mm Strap An implicit wait tells WebDriver to poll the DOM for a certain amount of time when trying to find any element (or elements) not immediately available. The default setting is 0. Once set, the implicit wait is set for the life of the WebDriver object.

from selenium import webdriver

driver = webdriver.Firefox()
driver.implicitly_wait(10) # secondsElla Les Taupe P'tites velours Bombes BFxHFE
driver.get(Nosy Flamenco Red A860 Clear Pumps Strap Heels Pvc 100mm T Louboutin Christian "http://somedomain/url_that_delays_loading")
Christian Red Clear A860 Heels 100mm Nosy Louboutin Pumps Pvc T Flamenco Strap myDynamicElement = driver.find_element_by_id("myDynamicElement")