selenium定位----By方法

from selenium.webdriver.common.by import By
### By关键字的使用
b = webdriver.Chrome()
b.implicitly_wait(30)
b.get('file:///E:/ZM20190316/2.Selenium/TestDemo/checkBoxDemo.html')
b.maximize_window()
## 实现元素定位与操作相分离
ele_loc = (By.ID,'id1')
b.find_element(*ele_loc).click()

ele_p = b.find_element_by_class_name("form-horizontal")

eles = b.find_elements(By.TAG_NAME,'input')
print(len(eles))

sleep(3)
b.quit()