Selenium series (X) - Operation and interpretation for Select Source drop-down box

If you want to learn from scratch Selenium, you can look at this series of articles Oh!

https://www.cnblogs.com/poloyy/category/1680176.html

Secondly, if you do not understand the basics of the front, so you need to replenish Oh, bloggers temporarily not learned (though I would, so I do not have to learn selenium review the front ha ha ha ...)

First, save the following html code into a file

Follow-up code to access this small cases are the html <! DOCTYPE html >

<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>下拉框</title>
</head>
<body>


<select id="pro">
    <option value="gd">广东</option>
    <option value="hb">湖北</option>
    <option value="gj">北京</option>
</select>


<select id="city" multiple>
    <option value="gz">广州</option>
    <option value="wh">武汉</option>
    <option value="gj">北京</option>
</select>
</body>
</html>

note

If the select drop-down box has multiple attributes, you can multi-select option, but this is not common

Operating on the drop-down box

Back to all options
Return all selected options
Uncheck the option selected by the value attribute or
Uncheck the option selected by the index or index
Uncheck the option to select the text or by inter-label
Uncheck all options

Options & select the operating return

# ! / Usr / bin / env Python 
# - * - Coding: UTF-8 - * - 

"" " 
__title__ = 
__TIME__ = 2020/3/25 17:52 
__Author__ = small pineapple test notes 
__Blog__ = https: // www. cnblogs.com/poloyy/ 
"" " 
from Time Import SLEEP 

from selenium.webdriver.support.select Import the Select
 from the Selenium Import webdriver 

Driver = webdriver.Chrome ( " ../resources/chromedriver.exe " ) 

# will change the html file own path 
driver.get ( " File: /// C: / drop-down box .html " ) 
driver.maximize_window ()

# Find select tag element 
Pro = the Select (driver.find_element_by_id ( " Pro " )) 

# returns all options 
for the Option in pro.options:
     Print (option.text) 

# returns all selected options 
for the Option in pro.all_selected_options:
     Print (option.text) 

# by value selected 
pro.select_by_value ( " BJ " ) 
SLEEP ( 1 ) 

# by index selected 
pro.select_by_index (1 ) 
SLEEP ( 1 ) 

#Selected by the label text 
pro.select_by_visible_text ( " Guangdong " )

Uncheck operation

# Find id = city drop-down box 
City = the Select (driver.find_element_by_id ( " City " )) 

# Select 
for the Option in city.options:
     IF  not option.is_selected (): 
        city.select_by_visible_text (option.text) 
SLEEP ( 1 ) 

# according to value uncheck 
city.deselect_by_value ( " BJ " ) 
SLEEP ( 1 ) 

# according to index uncheck 
city.deselect_by_index (0) 
SLEEP ( 1 ) 

# selected according to the label text 
city.deselect_by_visible_text ( " Wuhan" ) 
SLEEP ( 1 ) 

# Select 
for the Option in city.options:
     IF  not option.is_selected (): 
        city.select_by_visible_text (option.text) 
SLEEP ( 1 ) 

# uncheck all options 
city.deselect_all ()

Knowledge Point

Cancel the operation applies only to add multiple drop-down box, otherwise it will error

    raise NotImplementedError("You may only deselect options of a multi-select")
NotImplementedError: You may only deselect options of a multi-select

Select Source Reading

class Select(object):

    def __init__(self, webelement):
        """
        Constructor. A check is made that the given element is, indeed, a SELECT tag. If it is not,
        then an UnexpectedTagNameException is thrown.

        :Args:
         - webelement - element SELECT element to wrap

        Example:
            from selenium.webdriver.support.ui import Select \n
            Select(driver.find_element_by_tag_name("select")).select_by_index(2)
        """

Knowledge Point

Examples of Select need to pass select the drop-down box webelement
If the incoming webelement of tag_name not <select> .. </ select> tag, an exception is thrown UnexpectedTagNameException