selenium--判断元素是否存在

# coding:utf-8
from selenium import webdriver
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

driver=webdriver.Firefox()
class Find_Element():

def __inti__(self,driver):

self.driver=driver

def is_exist(self,locator,timeout=30,frequency=0.5):

"""

locator 参数是定位方式，如("id", "kw"),把两个参数合并为一个

*号是把两个参数分开传值

使用方法：

locator = ("id", "kw")

driver.find_element(*locator)

:param locator:

:param timeout:

:param frequency:

:return:

"""

try:

element=WebDriverWait(driver,timeout,frequency).until(lambda driver:driver.find_element(*locator))

return element


except:

return False


def is_exist2(self,by,value,timeout=30,frequency=0.5):

"""

locator 参数是定位方式，如("id", "kw"),把两个参数合并为一个

*号是把两个参数分开传值

使用方法：

locator = ("id", "kw")

driver.find_element(*locator)

:param locator:

:param timeout:

:param frequency:

:return:

"""

try:

element=WebDriverWait(driver,timeout,frequency).until(lambda driver:driver.find_element(by,value))

return element


except:

return False


def is_text_in_element(self,locator,text，timeout=30,frequency=0.5):

"""

locator 参数是定位方式，如("id", "kw"),把两个参数合并为一个

*号是把两个参数分开传值

使用方法：

locator = ("id", "kw")

driver.find_element(*locator)

:param locator:

:param timeout:

:param frequency:

:return:

"""

try:

element=WebDriverWait(driver,timeout,frequency).until(EC.text_to_be_present_in_element(locator，text))

return True


except:

return False


def send_keys(self,text,locate):

self.driver.find_element(*locate).send_keys(text)



if __name__=="__main__":

driver=webdriver.Firefox()

driver.get("https://www.baidu.com")

base_driver=Find_Element(driver) #实例化

input_loc=("id","kw")

base_driver.send_keys(input_loc,"致橡树的你")

driver.quit()

from selenium.webdriver.common.by import By

driver.find_element("id", "kw")
driver.find_element("xpath", "xxx")
driver.find_element("link text", "xxx")
driver.find_element("partial link text", "xxx")
driver.find_element("name", "xxx")
driver.find_element("tag name", "xxx")
driver.find_element("class name", "xxx")
driver.find_element("css selector", "xxx")