So rufen Sie eine Funktion von einer erwarteten Bedingungen

Question

Ich habe vor kurzem begonnen, automatisierte Tests am Beispiel der Mail-Service-Gmail zu lernen. Ich habe versucht, das Captcha durch eine Schleife zu rufen, aber ich habe nicht verstanden, wie die erwarteten Bedingungen funktionieren. Wie kann ich das Programm korrekt aufrufen? Entschuldige mich für das Englische.

from selenium import webdriver 
from selenium.webdriver.common.by import By 
from selenium.webdriver.support import expected_conditions as EC 
from selenium.webdriver.support.ui import WebDriverWait 


class my: 
    def loop_send_keys(self): 
     while (True): 

      self.email.send_keys("a") 
      self.email.submit() 
      if (self.captcha.is_displayed()): 
       return self.driver.find_elements(self, By.ID, "captcha-img") # Problem in this line 

    def launch(self): 
     self.a = False 
     driver = webdriver.Firefox() 
     self.driver = driver 
     driver.get("https://mail.google.com/") 
     driver.implicitly_wait(4) 
     self.email = driver.find_element_by_name("Email") 
     self.email.send_keys("sndb11") 
     self.captcha = self.driver.find_element_by_id("captcha-img") 
     WebDriverWait(driver, 10).until(
      EC.presence_of_all_elements_located(By.ID, self.loop_send_keys()) # and this 
     ) 


a = my() 
a.launch() 

Answer 1

Vor allem schlage ich vor, Sie that Tutorial zu lesen, sind Sie wirklich verwirrt über Selen-Nutzung.

link 1: (implicit wait doc)

link 2: (until method doc)

#!/usr/bin/python3.4 

import selenium 
from selenium import webdriver 
import selenium.common 
from selenium.webdriver.common.by import By 
from selenium.webdriver.support import expected_conditions as EC 
from selenium.webdriver.support.ui import WebDriverWait 


class my: 
    def loop_send_keys(self): 
     # here self is the driver (aka webdriver.Firefox()) (see link 2) 
     # do you really think that method should be in that class? 
     # at runtime the code executed is my.loop_send_keys(driver_instance) 
     # please consider moving that method outside that class, 
     # a module function would be great! 

     # You don not need a while loop here, the WebDriverWait().until() 
     # statement will call that method until return value is not 
     # False -> (see link 2) 

     self.find_element_by_id("next").submit() 
     try: 
      self.find_element_by_id("captcha-img") 
     except selenium.common.exceptions.NoSuchElementException: 
      # At least a return False statement should exist in that method 
      # (see link 2) 
      return False 
     else: 
      # Returning the return value of find_elements makes no sense, since 
      # you can not use that value (it is consumed by the until method) 
      # And why did you use a find elements method if you were looking 
      # for just an element? 
      return True 

    def launch(self): 
     # are you using it in the question? if not keep it away 
     # self.a = False 

     # driver = webdriver.Firefox() 
     # self.driver = driver 
     # why not simply ... 
     self.driver = webdriver.Firefox() 
     # ... ? 

     # You should call the implicitly wait before getting to the URL, 
     # since you need to call it one time per session -> (see link 1) 
     self.driver.implicitly_wait(10) 
     self.driver.get("https://mail.google.com/") 

     try: 
      # all methods find_element_by_* can raise NoSuchElementException 
      self.email = self.driver.find_element_by_name("Email") 
     except selenium.common.exceptions.NoSuchElementException: 
      print("Element with name Email not found") 
      return 

     # please ask generic questions, 'sndb11' does not make any sense 
     self.email.send_keys("not_existing_email\n") 

     # You should try to find the element after you have waited for it 

     # Until method needs only a method as argument -> (see link 2) 
     # Why did you use a presence_of_all_elements_located method ? 

     # That code does what you wanted: 
     WebDriverWait(self.driver, 10).until(my.loop_send_keys) 
     # but its really awful, why not simply doing: 
     # WebDriverWait(driver, 10).until(
     #    EC.presence_of_element_located((By.ID, "captcha-img"))) 
     # and getting rid of my.loop_send_keys method ? 

     try: 
      self.captcha = self.driver.find_element_by_id("captcha-img") 
      # when you have that element do whatever you want with it 
      print("here is the representation of self.captcha:"\ 
        "\n\t{}".format(repr(self.captcha))) 
      # but be careful that probably is not visible 
      if not self.captcha.is_displayed(): 
       print("WARNING: self.captcha element is not visible !!") 
     except selenium.common.exceptions.NoSuchElementException: 
      print("timeout of 10 seconds expired") 

if __name__ == "__main__": 
    a = my() 
    a.launch() 

Hinweis: Bitte versuchen Sie mehr klar und präzise zu sein, wenn Sie eine Frage stellen.