Sleeping Selenium WebDriver in Python with Milliseconds
Question:
How can I suspend the execution of Selenium WebDriver for milliseconds using Python?
Answer:
Using time.sleep(secs)
You can use the time library to sleep WebDriver for milliseconds by passing a floating-point number of seconds:
import time time.sleep(0.25) # Sleeps for 250 milliseconds
Caution:
However, using time.sleep(secs) without specific conditions defeats the purpose of automation because it suspends execution without checking element states.
Recommended Approach:
Instead of time.sleep(secs), use WebDriverWait in conjunction with expected_conditions to validate element states before proceeding. Here are three commonly used expected_conditions:
presence_of_element_located(locator)
Verifies that an element is present on the DOM regardless of visibility.
visibility_of_element_located(locator)
Confirms that an element is present, visible, and has non-zero height and width.
element_to_be_clickable(locator)
Ensures that an element is visible, enabled, and clickable.
Example:
from selenium.webdriver import WebDriverWait from selenium.webdriver.common.by import By from selenium.webdriver.support import expected_conditions as EC # Wait 10 seconds until the element with the ID "my_element" becomes visible before clicking it WebDriverWait(driver, 10).until(EC.visibility_of_element_located((By.ID, "my_element"))) driver.find_element(By.ID, "my_element").click()
Reference:
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