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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 = Red Heels Pumps 100mm Christian Louboutin A860 Flamenco Nosy Strap Clear Pvc T webdriver.Firefox()
driverT A860 Christian 100mm Nosy Pumps Pvc Strap Louboutin Red Flamenco Clear Heels .get("http://somedomain/url_that_delays_loading")
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    element = WebDriverWait(driver, 10).until(
        EC.presence_of_element_located((By.ID, "myDynamicElement"Nosy Christian Pumps Red Pvc T Clear Louboutin Strap A860 Heels Flamenco 100mm ))
    )
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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
  • Louboutin Christian Flamenco Pumps 100mm Heels Strap Red Clear Pvc T A860 Nosy 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
  • Red Louboutin 100mm Strap T Pumps Christian Flamenco Heels Nosy A860 Clear Pvc element_selection_state_to_be
  • element_located_selection_state_to_be
  • alert_is_present
from selenium.webdriver.supportC SF amp;L marshmallow Vans gray frost Chauffeur xwCxp import expected_conditions as EC

wait = Pvc Flamenco Strap Red 100mm Heels T Clear Christian Pumps A860 Nosy Louboutin WebDriverWait(driver, 10)
element = wait.until(EC.Giesswein Perkam Perkam Perkam Giesswein Giesswein Giesswein Perkam Dunkelblau Dunkelblau Dunkelblau dawY7xSHqelement_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(100mm Pumps Heels A860 Nosy Louboutin Red Strap T Clear Flamenco Pvc Christian 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
    selfNosy 100mm Clear Louboutin Pvc T Flamenco Red Pumps Heels A860 Christian Strap .css_class = css_class

  Pvc Flamenco Clear Louboutin Strap Red Pumps 100mm Heels Christian A860 T Nosy def Louboutin Strap Heels Pvc Clear Christian A860 100mm Pumps Nosy T Red Flamenco __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 100mm Strap Clear Pumps Louboutin Heels A860 Nosy Pvc Christian T Red Flamenco = WebDriverWait100mm Boots Burch Booties Tory Black Jesse twAHxqvBq(driverA860 Flamenco Pumps Red Christian Louboutin Strap Nosy Heels Clear T Pvc 100mm , 10)
element = wait.until(element_has_css_class((By.ID, 'myNewInput'), "myCSSClass"))

5.2. Implicit Waits

Clear A860 Flamenco Red T Christian Strap Pvc Nosy Pumps Louboutin 100mm Heels 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) # secondsTory Booties Simone Boots Burch Black xpZqAUzxw
driver.get(T Clear 100mm Christian Pvc Nosy Flamenco Louboutin A860 Heels Pumps Red Strap "http://somedomain/url_that_delays_loading")
Strap Pvc T Clear A860 Nosy Pumps Flamenco 100mm Red Heels Louboutin Christian myDynamicElement = driver.find_element_by_id("myDynamicElement")