Selenium in Python

Selenium Waiting

Time

強制等待。莫論Browser是否完成前程序，也要等待指定間到後才執行。

from selenium import webdriver

from time import sleep

driver = webdriver.Chrome()

driver.get('https://www.google.com')

sleep(3) # Wait for 3 seconds

print (driver.current_url)

print (driver.page_source)

driver.quit()

Implicitly_wait

隱性等待。等待Browser 指定時間 或 Browser完成前程序便即時執行下一個程序。

from selenium import webdriver

from time import sleep

driver = webdriver.Chrome()

driver.get('https://www.google.com')

driver.implicitly_wait(30) # Wait for 30 seconds or util broswer finished loading

print (driver.current_url)

print (driver.page_source)

driver.quit()

WebDriverWait

配合使用 until() 及 until_not()，按條件等待。

from selenium import webdriver

from selenium.webdriver.support.wait import WebDriverWait

from selenium.webdriver.support import expected_conditions as EC

from selenium.webdriver.common.by import By

from time import sleep

driver = webdriver.Chrome()

driver.get('https://www.google.com')

driver.implicitly_wait(30) # Wait for 30 seconds or util broswer finished loading

locator = (By.LINK_TEXT, 'CSDN')

try:

WebDriverWait(driver, 20, 0.5).until(EC.presence_of_element_located(locator))

print driver.find_element_by_link_text('CSDN').get_attribute('href')

finally:

driver.close()

Reference
https://huilansame.github.io/huilansame.github.io/archivers/sleep-implicitlywait-wait