我正在尝试使用Selenium / Python自动从http://factfinder.census.gov下载数据集。我是Javascript的新手,所以如果这是一个容易解决的问题,请道歉。我现在正在编写代码的开头部分,它应该:
我被困在第3步。这是截图;好像我想访问div w / id" scrollable_container_topics"然后迭代或索引以获取其子节点(在这种情况下,我想要最后一个子节点)。我已经尝试使用script_execute,然后按id和类名定位元素,但到目前为止还没有任何工作。我很感激任何指示。
这是我的代码:
import os
import re
import time
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions
from selenium.webdriver.support.wait import WebDriverWait
from selenium.webdriver.support.select import Select
# A list of all the variables we want to extract; corresponds to "Topics" field on site
topics = ["B03003", "B05001"]
# A list of all the states we want to extract data for (currently, strings; is there a numeric code?)
states = ["New Jersey", "Georgia"]
# A vector of all the years we want to extract data for [lower, upper) *Note* this != range of years covered by data
years = range(2009, 2010)
# Define the class
class CensusSearch:
# Initialize and set attributes of the query
def __init__(self, topic, state, year):
"""
:type topic: str
:type state: str
:type year: int
"""
self.topic = topic
self.state = state
self.year = year
def setUp(self):
# self.driver = webdriver.Chrome("C:/Python34/Scripts/chromedriver.exe")
self.driver = webdriver.Firefox()
def extractData(self):
driver = self.driver
driver.set_page_load_timeout(1000000000000)
driver.implicitly_wait(100)
# Navigate to site; this url = after you have already chosen "Advanced Search"
driver.get("http://factfinder.census.gov/faces/nav/jsf/pages/searchresults.xhtml?refresh=t")
driver.implicitly_wait(10)
# FIlter by dataset (want the ACS 1, 3, and 5-year estimates)
driver.execute_script("document.getElementsByClassName('leftnav_btn')[0].click()") # click the "Topics" button
driver.implicitly_wait(20)
# This is where I am stuck; I've tried the following:
getData = driver.find_element_by_id("ygtvlabelel172")
getData.click()
driver.implicitly_wait(10)
# Filter geographically: select all counties in the United States and Puerto Rico
# Click "Geographies" button
driver.execute_script("document.getElementsByClassName('leftnav_btn')[1].click()")
driver.implicitly_wait(10)
drop_down = driver.find_element_by_class_name("popular_summarylevel")
select_box = Select(drop_down)
select_box.select_by_value("050")
# Once "Geography" is clicked, select "County - 050" from the drop-down menu; then select "All US + Puerto Rico"
drop_down_counties = driver.find_element_by_id("geoAssistList")
select_box_counties = Select(drop_down_counties)
select_box_counties.select_by_index(1)
# Click the "ADD TO YOUR SELECTIONS" button
driver.execute_script("document.getElementsByClassName('button-g')[0].click()")
driver.implicitly_wait(10)
def tearDown(self):
self.driver.quit()
def main(self):
#print(getattr(self))
print(self.state)
print(self.topic)
print(self.year)
self.setUp()
self.extractData()
self.tearDown()
for a in topics:
for b in states:
for c in years:
query = CensusSearch(a, b, c)
query.main()
print("done")
答案 0 :(得分:1)
要解决的几件事:
there
方法 - selenium拥有自己的方法来定位页面上的元素document.getElement..
不会表现为implicitly_wait()
- 您不会立即延迟时间)或页面加载超时这种情况 - 在页面上执行操作之前只需使用Explicit Waits 这是一个工作代码,点击“主题”,然后点击“数据集”:
time.sleep()