from selenium import webdriverimport timeimport urllib2class Download():        def __init__(self):                        self.fp = webdriver.FirefoxProfile()                self.fp.set_preference("browser.download.folderList",2)        self.fp.set_preference("browser.download.manager.showWhenStarting",False)        self.fp.set_preference("browser.download.dir", r"C:\download")        self.fp.set_preference("browser.helperApps.neverAsk.saveToDisk",                          "application/octet-stream")                    def ClickAndDown(self,baseurl,classname):                                dr = webdriver.Firefox(firefox_profile=self.fp)                dr.get(baseurl)                time.sleep(10)                downbtn = dr.find_element_by_class_name(classname)                time.sleep(1)                downbtn.click()                time.sleep(60)                        dr.close()                dr.quit()                dr = None        time.sleep(10)