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How do I extract the data from these JavaScript tables using Selenium and Python?

I am very new to Python, JavaScript, and Web-Scraping. I am trying to write code that writes all of the data in tables like this into a csv file. The webpage is "https://www.mcmaster.com/cam-lock-fittings/material~aluminum/"
I started by trying to find the data in the html but then realized that the website uses JavaScript. I then tried using selenium but I cannot find anywhere in the JavaScript code that has the actual data that is displayed in these tables. I wrote this code to see if I could find the display data anywhere but I was unable to find it.
from urllib.request import urlopen
from bs4 import BeautifulSoup
from selenium import webdriver
url = 'https://www.mcmaster.com/cam-lock-fittings/material~aluminum/'
options = webdriver.ChromeOptions()
options.add_experimental_option('excludeSwitches', ['enable-logging'])
driver = webdriver.Chrome(executable_path='C:/Users/Brian Knoll/Desktop/chromedriver.exe', options=options)
driver.get(url)
html = driver.execute_script("return document.documentElement.outerHTML")
driver.close()
filename = "McMaster Text.txt"
fo = open(filename, "w")
fo.write(html)
fo.close()
I'm sure there's an obvious answer that is just going over my head. Any help would be greatly appreciated! Thank you!

I guess you need to wait till the table your looking for is loaded.
To do so, add the following line to wait for 10 seconds before start scraping the data
fullLoad = WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.XPATH, "//div[contains(#class, 'ItmTblCntnr')]")))
Here is the full code:
from urllib.request import urlopen
from bs4 import BeautifulSoup
from selenium import webdriver
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By
url = 'https://www.mcmaster.com/cam-lock-fittings/material~aluminum/'
options = webdriver.ChromeOptions()
options.add_experimental_option('excludeSwitches', ['enable-logging'])
driver = webdriver.Chrome(executable_path=os.path.abspath("chromedriver"), options=options)
driver.get(url)
fullLoad = WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.XPATH, "//div[contains(#class, 'ItmTblCntnr')]")))
html = driver.execute_script("return document.documentElement.outerHTML")
driver.close()
filename = "McMaster Text.txt"
fo = open(filename, "w")
fo.write(html)
fo.close()

getting dynamic data using python

I'm new to Python and got interested in writing scripts. I'm currently building a crawler that goes on a page and extract copy from tags. Write now I can only list tags; I'm having trouble getting the text out of tags and I'm not sure why exactly. I'm also using BeautifulSoup and PyQt4 to get dynamic data(this might need a new question).
So based on this code below, I should be getting the "Images" copy from the Google homepage, or at least the span tag itself. I'm getting returned NONE
I tried reading the docs for BeautifulSoup and it was a little overwhelming. I'm still reading it, but I think I keep going down a rabbit hole. I can print all anchor tags or all divs, but targeting a specific one is where I'm struggling.
import urllib
import re
from bs4 import BeautifulSoup, Comment
import sys
from PyQt4.QtGui import *
from PyQt4.QtCore import *
from PyQt4.QtWebKit import *
class Render(QWebPage):
def __init__(self, url):
self.app = QApplication(sys.argv)
QWebPage.__init__(self)
self.loadFinished.connect(self._loadFinished)
self.mainFrame().load(QUrl(url))
self.app.exec_()
def _loadFinished(self, result):
self.frame = self.mainFrame()
self.app.quit()
url = 'http://google.com'
source = urllib.urlopen(url).read()
soup = BeautifulSoup(source, 'html.parser')
js_test = soup.find("a", class_="gb_P")
print js_test

Form scraping using scrapy with Javascript embedded

I am trying to scrape this website. My spider is functional but the website has javascript embedded in the form to get the result, which I can t get through.
I've read about selenium and how I have to include a browser to get through it but I still with how to scrape after the dynamically generated HTML is loaded, while still passing form arguments.
Here is the code for my spider, any help, referrals or code snippets are welcome. I've navigated and read many threads to no avail.
from scrapy.spiders import BaseSpider
from scrapy.http import FormRequest
from scrapy.http import Request
from scrapy.selector import HtmlXPathSelector
from tax1.items import Tax1Item
from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor
from scrapy.contrib.spiders import CrawlSpider, Rule
from scrapy.selector import Selector
from selenium import webdriver
import time
class tax1Spider(BaseSpider):
name = "tax1Spider"
allowed_domains = ["http://taxesejour.impots.gouv.fr"]
start_urls = ["http://taxesejour.impots.gouv.fr/DTS_WEB/UK/"]
def parse(self, response):
yield FormRequest.from_response(response,
formname='PAGE_DELIBV2',
formdata={'A8':'05 - Hautes-alpes',
'A10':'AIGUILLES'},
callback = self.parse1)
rules = (
Rule(SgmlLinkExtractor(allow=(), restrict_xpaths=('//div[#class="lh0 dzSpan dzA15"]',)), callback="parse1", follow= True))
# lh0 dzSpan dzA15
def __init__(self):
CrawlSpider.__init__(self)
# use any browser you wish
self.browser = webdriver.Firefox()
def __del__(self):
self.browser.close()
def parse1(self, response):
#hxs = HtmlXPathSelector(response)
self.browser.get(response.url)
time.sleep(3)
Selector(text=self.browser.page_source)
items = []
#item = Tax1Item()
item['message'] = hxs.select('//td[#id="tzA18"]').extract()
print item['message']
return item

Selenium Click() not working with scrapy spider

I am trying to scrape links to product pages from a listing page using a scrapy spider. The page shows the first 10 machines and has a button for 'show all machines' that calls some javascript. The javascript is reasonably complicated (i.e. I can't just look at the function and see the url that the button points to). I'm trying to use the selenium webdriver to simulate a click on the button but it isn't working for some reason. When I scrape the product links I only get the first 10, not the complete list.
Can anybody tell me why it doesn't work?
The page I'm trying to scrape is http://www.ncservice.com/en/second-hand-milling-machines
The spider is
from scrapy.selector import HtmlXPathSelector
from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor
from scrapy.contrib.spiders import CrawlSpider, Rule
from scrapy.http import Request, FormRequest
from scrapy import log
from scrapy.exceptions import DropItem
from scrapy import signals
from mtispider.items import MachineItem
import urlparse
import time
import MySQLdb
import unicodedata
import re
from mtispider import tools
from selenium import webdriver
class MachineSpider(CrawlSpider):
name = 'nc-spider'
allowed_domains = ['ncservice.com']
def start_requests(self):
requests = list(super(MachineSpider, self).start_requests())
requests.append(Request('http://www.ncservice.com/en/second-hand-milling-machines', callback=self.parsencmilllist))
return requests
def parsencmilllist(self,response):
hxs=HtmlXPathSelector(response)
driver= webdriver.Firefox()
driver.get(response.url)
try:
driver.FindElement(By.Id("mas-resultados-fresadoras")).Click()
except:
log.msg("Couldnt get all the machines", level=log.INFO)
ncmachs = hxs.select('//div[#id="resultados"]//a/#href').extract()
for ncmach in ncmachs:
yield Request(ncmach,
meta = {'type':'Milling'},
callback=self.parsencmachine)
driver.quit()
def parsencmachine(self,response):
#scrape the machine
return item
Thanks!

The main problem is that you need to initialize your Selector from the webdriver's page_source and not the response passed into the callback:
from scrapy.contrib.spiders import CrawlSpider
from scrapy.http import Request
from scrapy import Selector
from selenium import webdriver
class MachineSpider(CrawlSpider):
name = 'nc-spider'
allowed_domains = ['ncservice.com']
def start_requests(self):
yield Request('http://www.ncservice.com/en/second-hand-milling-machines',
callback=self.parsencmilllist)
def parsencmilllist(self, response):
driver = webdriver.Firefox()
driver.get(response.url)
driver.find_element_by_id("mas-resultados-fresadoras").click()
sel = Selector(text=driver.page_source)
driver.quit()
links = sel.xpath('//div[#id="resultados"]//a/#href').extract()
for link in links:
yield Request(link,
meta={'type': 'Milling'},
callback=self.parsencmachine)
def parsencmachine(self, response):
print response.url

How do you pass html to Selenium

I have a webcrawler and I want to pass the html+javascript it retrieves into selenium, is this possible? To clarify I do not want to use webdriver.get to retrieve the page with selenium since my crawler is faster.

I ended up scraping the webpage with PyQt4 on a xvfb server since I was using amazon ec2 which doesn't come with x11. The code below loads the webpage containing JavaScript and waits 7 seconds before returning the html so all the JavaScript will have finished loading.
import sys
from PyQt4.QtGui import *
from PyQt4.QtCore import *
from PyQt4.QtWebKit import *
from xvfbwrapper import Xvfb
class Render(QWebPage):
def __init__(self, url):
self.app = QApplication(sys.argv)
QWebPage.__init__(self)
self.timerScreen = QTimer()
self.timerScreen.setInterval(7000)
self.timerScreen.setSingleShot(True)
self.timerScreen.timeout.connect(self.getHtml)
self.loadFinished.connect(self.timerScreen.start)
self.mainFrame().load(QUrl(url))
self.app.exec_()
def getHtml(self):
self.frame = self.mainFrame()
self.app.quit()
args = {"nolisten":"tcp"}
vdisplay = Xvfb(**args)
vdisplay.start()
url = 'url here'
r = Render(url)
html = r.frame.toHtml()
print html
f = open("./test.html","wb")
f.write(html.__str__().encode("utf-8"))
f.close()
#stri = str(html).encode("utf-8")
vdisplay.stop()