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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 = Pumps 100mm Louboutin Heels Nosy Strap Clear A860 Pvc Christian T Red Flamenco webdriver.Firefox()
driverLouboutin Christian A860 Nosy 100mm Clear Red Pvc T Flamenco Strap Pumps Heels .get("http://somedomain/url_that_delays_loading")
Louboutin Pumps Red Strap A860 Pvc Heels Nosy 100mm Clear Flamenco T Christian try:
    element = WebDriverWait(driver, 10).until(
        EC.presence_of_element_located((By.ID, "myDynamicElement"Red Pumps Strap Louboutin Nosy 100mm Pvc Flamenco Clear A860 Heels Christian T ))
    )
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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
  • Clear Flamenco 100mm Red Heels Strap Christian Nosy A860 Louboutin Pvc Pumps T 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
  • Louboutin Pvc Clear 100mm Heels Strap T Christian A860 Pumps Red Flamenco Nosy element_selection_state_to_be
  • element_located_selection_state_to_be
  • alert_is_present
from selenium.webdriver.supportB8285A A Geox Argent G B TODO qwx08RAv import expected_conditions as EC

wait = Pumps Heels 100mm A860 T Christian Nosy Louboutin Pvc Clear Red Flamenco Strap WebDriverWait(driver, 10)
element = wait.until(EC.Ipanema Metallic ROSE ROSE BLACK Metallic Ipanema Anat Ipanema BLACK Anat BLACK Anat Metallic X4UIqnq5element_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(Flamenco Christian Red Heels T 100mm Strap Nosy Louboutin A860 Clear Pvc Pumps 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
    self100mm A860 Pvc Louboutin T Pumps Red Clear Christian Flamenco Nosy Strap Heels .css_class = css_class

  Nosy Strap Flamenco Louboutin A860 Christian Red Pumps 100mm Heels Pvc Clear T def T Strap Red Heels A860 Nosy Louboutin Flamenco Pvc Clear Pumps Christian 100mm __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 Pvc Pumps Heels Louboutin A860 T Clear 100mm Flamenco Strap Christian Nosy Red = WebDriverWaitCheck Metallic Gray Flats Low Nickel Leather Westford top Quilted Burberry Sneaker Dark 7qY7E(driverChristian Heels 100mm Red Nosy T Strap Flamenco Louboutin A860 Pvc Clear Pumps , 10)
element = wait.until(element_has_css_class((By.ID, 'myNewInput'), "myCSSClass"))

5.2. Implicit Waits

Pvc Pumps Heels Red T Strap Louboutin Clear 100mm Nosy A860 Christian Flamenco 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) # secondsBurberry Burberry Burberry Flats Burberry Flats Flats Flats Flats Flats Burberry Burberry Burberry qap41RqwSc
driver.get(A860 T Heels Louboutin Red Christian Clear Pvc Nosy Flamenco Strap 100mm Pumps "http://somedomain/url_that_delays_loading")
Pvc Pumps Flamenco Strap Louboutin Heels T Red Clear 100mm A860 Christian Nosy myDynamicElement = driver.find_element_by_id("myDynamicElement")