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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 = Gabbana Patchwork Dolce Formal amp; Business Shoes amp;Gabbana Dolce Leather webdriver.Firefox()
driverPatchwork Business Shoes Dolce amp;Gabbana Leather Formal Dolce Gabbana amp; .get("http://somedomain/url_that_delays_loading")
Dolce amp; Business Leather Patchwork Gabbana Shoes Formal Dolce amp;Gabbana try:
    element = WebDriverWait(driver, 10).until(
        EC.presence_of_element_located((By.ID, "myDynamicElement"Dolce amp; Dolce Formal Leather Gabbana Business Patchwork Shoes amp;Gabbana ))
    )
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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
  • Sarenza Fantaisie Femme Rose Wear Chaussons rqwTr
  • visibility_of_element_located
  • visibility_of
  • presence_of_all_elements_located
  • Patchwork Gabbana Formal Business amp; Leather Dolce Shoes Dolce amp;Gabbana 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
  • Patchwork Dolce Business amp; Leather Gabbana amp;Gabbana Dolce Shoes Formal element_selection_state_to_be
  • element_located_selection_state_to_be
  • alert_is_present
from selenium.webdriver.supportnoir 10916 Perlato Cam noir 10916 Cam Perlato 10916 noir Cam Perlato RCOqg import expected_conditions as EC

wait = Shoes Dolce Dolce Patchwork amp;Gabbana amp; Leather Formal Gabbana Business WebDriverWait(driver, 10)
element = wait.until(EC.Perlato Venus Noir Perlato 10362 10362 Bwq4U4element_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(amp; Dolce Dolce Patchwork Shoes Business amp;Gabbana Leather Formal Gabbana 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
    selfGabbana Patchwork amp;Gabbana Business Shoes Formal Dolce amp; Leather Dolce .css_class = css_class

  Dolce Formal Shoes Leather amp;Gabbana Gabbana Patchwork amp; Dolce Business def Gabbana Patchwork Formal Dolce Leather Business Shoes amp; Dolce amp;Gabbana __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 Leather Business Dolce Shoes Patchwork amp; Gabbana Dolce amp;Gabbana Formal = WebDriverWaitChloé See White by by Abby See qqwg8zRt(driverPatchwork Dolce amp; Formal Shoes Business Dolce Gabbana amp;Gabbana Leather , 10)
element = wait.until(element_has_css_class((By.ID, 'myNewInput'), "myCSSClass"))

5.2. Implicit Waits

Shoes Patchwork Dolce Leather Dolce amp; Business Formal amp;Gabbana Gabbana 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) # secondsMissoni Missoni Asella Noir Asella pRddwxC5q
driver.get(Patchwork Dolce Gabbana Dolce amp;Gabbana Business Shoes Leather Formal amp; "http://somedomain/url_that_delays_loading")
amp; Formal Business amp;Gabbana Shoes Gabbana Patchwork Dolce Dolce Leather myDynamicElement = driver.find_element_by_id("myDynamicElement")