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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def initiate_browser(self):
 # Create a unique tempdir for downloaded files tempdir = os.getenv(TEMPDIR_ENVVAR, DEFAULT_TEMPDIR) tempsubdir = uuid4().hex # TODO: Remove this directory when finished! self.tempdir = os.path.join(tempdir, tempsubdir) try: # Try and create directory before checking if it exists, # to avoid race condition os.makedirs(self.tempdir) except OSError: if not os.path.isdir(self.tempdir):
 raise profile = webdriver.FirefoxProfile() # Set download location, avoid download dialogues if possible # Different settings needed for different Firefox versions profile.set_preference('browser.download.folderList', 2) profile.set_preference('browser.download.manager.showWhenStarting', False) profile.set_preference('browser.download.manager.closeWhenDone', True) profile.set_preference('browser.download.dir', self.tempdir) profile.set_preference("browser.helperApps.neverAsk.saveToDisk", "application/octet-stream;application/vnd.ms-excel") profile.set_preference("browser.helperApps.alwaysAsk.force", False) profile.set_preference("browser.download.manager.useWindow", False) self.browser = webdriver.Firefox(profile) self.browser.get('http://webbstat.av.se') detailed_cls = "Document_TX_GOTOTAB_Avancerad" """ The button for expanded detailed options. This also happens to be a good indicator as to wheter all content is loaded. """


        # Wait for a content element, and 3 extra seconds just in case
        WebDriverWait(self.browser, PAGELOAD_TIMEOUT)\
            .until(EC.presence_of_element_located((By.CLASS_NAME,
                                                  detailed_cls)))
        self.browser.implicitly_wait(3)

        self.browser\
            .find_element_by_class_name(detailed_cls)\
            .find_element_by_tag_name("td")\
            .click()
        # Wait for a content element, and 3 extra seconds just in case
        WebDriverWait(self.browser, PAGELOAD_TIMEOUT)\
            .until(EC.presence_of_element_located((By.CLASS_NAME,
                                                   detailed_cls)))
        self.browser.implicitly_wait(3)