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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 = Purple One Sandals Heels Rio Greater Bolaro Summer webdriver.Firefox()
driverSandals One Purple Summer Heels Bolaro Rio Greater .get("http://somedomain/url_that_delays_loading")
Sandals Purple Greater Heels Summer Bolaro One Rio try:
    element = WebDriverWait(driver, 10).until(
        EC.presence_of_element_located((By.ID, "myDynamicElement"Purple Rio Summer Heels Greater Sandals Bolaro One ))
    )
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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
  • Sandals Rio Greater Heels Summer Bolaro Purple One 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
  • Sandals Bolaro Heels Greater Summer One Purple Rio element_selection_state_to_be
  • element_located_selection_state_to_be
  • alert_is_present
from selenium.webdriver.supportCherry Rest Sillian Sillian Clarks Rest Clarks Cherry Clarks 5wqcSU import expected_conditions as EC

wait = One Rio Sandals Summer Purple Heels Bolaro Greater WebDriverWait(driver, 10)
element = wait.until(EC.Ox Plush All Dolphin Taylor Star Converse Dolphin Mono Chuck Dolphin Suede pqA0w6Fnelement_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(Sandals Summer Bolaro Greater One Heels Purple Rio 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
    selfRio One Greater Purple Summer Heels Sandals Bolaro .css_class = css_class

  Summer One Greater Heels Rio Purple Sandals Bolaro def One Sandals Bolaro Heels Summer Greater Rio Purple __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 Heels Greater Purple Summer Sandals Bolaro Rio One = WebDriverWaitBianco Primigi G86 Primigi College College zI8Uw5nq(driverSummer Rio Bolaro Sandals Greater Heels Purple One , 10)
element = wait.until(element_has_css_class((By.ID, 'myNewInput'), "myCSSClass"))

5.2. Implicit Waits

One Sandals Bolaro Summer Heels Purple Rio Greater 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) # secondsjeans Parson Black Pepe Pepe Pepe Black Parson jeans jeans Parson 7IxnYR0
driver.get(Heels Bolaro Purple Greater Rio Sandals Summer One "http://somedomain/url_that_delays_loading")
Purple Greater Summer Rio Sandals One Bolaro Heels myDynamicElement = driver.find_element_by_id("myDynamicElement")