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正如标题所说，我正在使用 MechanicalSoup 开展一个项目，我想知道如何编写一个函数来返回 DropDown 列表的可能选项。是否可以通过名称/id 搜索元素，然后让它返回选项？

import mechanicalsoup
from bs4 import BeautifulSoup

#Sets StatefulBrowser Object to winnet then it it grabs form
browser = mechanicalsoup.StatefulBrowser()
winnet = "http://winnet.wartburg.edu/coursefinder/"
browser.open(winnet)
Searchform = browser.select_form()

#Selects submit button and has filter options listed.
Searchform.choose_submit('ctl00$ContentPlaceHolder1$FormView1$Button_FindNow')
Searchform.set('ctl00$ContentPlaceHolder1$FormView1$TextBox_keyword', input()) #Keyword Searches by Class Title. Inputting string will search by that string ignoring any stored nonsense in the page.
#ACxxx Course Codes have 3 spaces after them, THIS IS REQUIRED. Except the All value for not searching by a Department does not.
Searchform.set("ctl00$ContentPlaceHolder1$FormView1$DropDownList_Department", 'CS   ') #For Department List, it takes the CourseCodes as inputs and displays as the Full Name
Searchform.set("ctl00$ContentPlaceHolder1$FormView1$DropDownList_Term", "2020 Winter Term") # Term Dropdown takes a value that is a string. String is Exactly the Term date.
Searchform.set('ctl00$ContentPlaceHolder1$FormView1$DropDownList_MeetingTime', 'all') #Takes the Week Class Time as a String. Need to Retrieve list of options from pages
Searchform.set('ctl00$ContentPlaceHolder1$FormView1$DropDownList_EssentialEd', 'none') #takes a small string signialling the EE req or 'all' or 'none'. None doesn't select and option and all selects all coruses w/ a EE
Searchform.set('ctl00$ContentPlaceHolder1$FormView1$DropDownList_CulturalDiversity', 'none')# Cultural Diversity, Takes none, C, D or all
Searchform.set('ctl00$ContentPlaceHolder1$FormView1$DropDownList_WritingIntensive', 'none') # options are none or WI
Searchform.set('ctl00$ContentPlaceHolder1$FormView1$DropDownList_PassFail', 'none')# Pass/Faill takes 'none' or 'PF'
Searchform.set('ctl00$ContentPlaceHolder1$FormView1$CheckBox_OpenCourses', False) #Check Box, It's True or False
Searchform.set('ctl00$ContentPlaceHolder1$FormView1$DropDownList_Instructor', '0')# 0 is for None Selected otherwise it is a string of numbers (Instructor ID?)

#Submits Page, Grabs results and then launches a browser for test purposes.
browser.submit_selected()# Submits Form. Retrieves Results.
table = browser.get_current_page().find('table') #Finds Result Table
print(type(table))
rows = table.get_text().split('\n') # List of all Class Rows split by \n. 
print(type(rows))
browser.launch_browser()
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1 回答 1

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我想知道是否要发布可以通过以下操作检索它们列表的选项：

options_list = browser.get_current_page().findAll('option') #Finds Result Table

然后我可以使用 for 循环来提取文本和基础值：

vlist = []
tlist = []
for option in options_list:
    value = str(option).split('"') # Splits option into chunks, value[1] is the value
    vlist.append(value[1])
    tlist.append(option.get_text())

本质上，我能够制作两个单独的列表，一个包含选项的文本，一个包含基础值。这可以修改为添加到字典并创建一组键：值对，这在某些应用程序中会更有用。

于 2020-02-13T14:11:41.133 回答