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Question

我試圖從該頁面的方法： Upload file with Selenium in Python

代碼：

file_button = browser.find_element_by_id('fileUploadProxy') 
file_button.send_keys('/Users/home/Downloads/1-Students-and-Parent-Email.csv') 

，但我得到了以下錯誤：

Traceback (most recent call last): 
    File "test.py", line 110, in <module> 
    upload_students_results('Surname, Name') 
    File "test.py", line 91, in upload_students_results 
    file_button.send_keys('/Users/home/Downloads/1-Students-and-Parent-Email.csv') 
    File "/Library/Python/2.7/site-packages/selenium/webdriver/remote/webelement.py", line 349, in send_keys 
'value': keys_to_typing(value)}) 
    File "/Library/Python/2.7/site-packages/selenium/webdriver/remote/webelement.py", line 493, in _execute 
return self._parent.execute(command, params) 
    File "/Library/Python/2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 249, in execute 
self.error_handler.check_response(response) 
    File "/Library/Python/2.7/site-packages/selenium/webdriver/remote/errorhandler.py", line 193, in check_response 
raise exception_class(message, screen, stacktrace) 
selenium.common.exceptions.WebDriverException: Message: unknown error: cannot focus element 
    (Session info: chrome=58.0.3029.96) 
    (Driver info: chromedriver=2.29.461585 (0be2cd95f834e9ee7c46bcc7cf405b483f5ae83b),platform=Mac OS X 10.12.4 x86_64) 

Answer 1

的問題是 - 您正在向不是「可交互」的div元素髮送密鑰，不接受密鑰 - 因此「無法聚焦元素」錯誤。

你鏈接的解決方案背後的想法是發送鍵與type="file"的input元素是負責文件上傳。在你的HTML中找到這個元素併發送密鑰。

請注意，此元素可能不可見。在這種情況下，您應該首先使用make it visible爲send_keys()工作。

---

更新：

好了，現在我們至少知道哪個元素是我們所期望的一個：

<input type="file" name="fileToUpload" id="fileToUpload2" class="fileToUpload"> 

既然你有麻煩定位此元素，可嘗試waiting for it：

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


file_upload = WebDriverWait(driver, 10).until(
    EC.presence_of_element_located((By.ID, "fileToUpload2")) 
) 
file_upload.send_keys('/Users/home/Downloads/1-Students-and-Parent-Email.csv') 

或/和，che ck如果此元素在iframe之內 - 如果是，則需要切換到iframe的上下文，然後才執行元素搜索。