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トップに関する質問Pythonでのスクレイピングでうまく抽出できない

編集履歴

質問編集履歴

3

コードの修正

2020/12/19 07:51

投稿

nnnnnnn-kkkkkk
nnnnnnn-kkkkkk

スコア39

title CHANGED
File without changes
body CHANGED
@@ -25,16 +25,16 @@
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  scraping_count = 0 #確認用変数
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  while page_number <= page_number_max:
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- class_group = driver.find_elements_by_class_name("rc") #クラス名だけ探す
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+ class_group = driver.find_elements_by_class_name("rc")
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  for class_name in class_group:
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- title_list.append(class_name.find_element_by_class_name("LC20lb DKV0Md"))
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+ title_list.append(class_name.find_element_by_class_name("LC20lb DKV0Md").text)
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  url_list.append(class_name.find_element_by_tag_name("a").get_attribute("href"))
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  scraping_count += 1
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- if driver.find_elements_by_name("pnnext") == []: #次のページがなかったらループを抜け出す
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+ if driver.find_elements_by_id("pnnext") == []: #次のページがなかったらループを抜け出す
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  page_number = page_number_max + 1
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  else:
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- next_page = driver.find_elements_by_name("pnnext").get_attribute("href")
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+ next_page = driver.find_elements_by_id("pnnext").get_attribute("href")
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  driver.get(next_page)
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  page_number += 1
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  time.sleep(3)
@@ -70,13 +70,13 @@
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  ```
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  実行すると以下のように出力されます。
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  > 引用テキスト
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- DevTools listening on ws://127.0.0.1:49192/devtools/browser/ed2754e1-b7b2-4f70-9563-6e9ebf346065
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+ DevTools listening on ws://127.0.0.1:49835/devtools/browser/d77618c9-a3d6-4982-814e-034bac32c200
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- [14264:7080:1219/163616.006:ERROR:device_event_log_impl.cc(211)] [16:36:16.005] USB: usb_device_handle_win.cc:1020 Failed to read descriptor from node connection: システムに接続されたデバイスが機能していません。 (0x1F)
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+ [9312:13168:1219/164828.980:ERROR:device_event_log_impl.cc(211)] [16:48:28.980] USB: usb_device_handle_win.cc:1020 Failed to read descriptor from node connection: システムに接続されたデバイスが機能していません。 (0x1F)
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  Traceback (most recent call last):
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  File "C:\Users\yagla\Program_lessons\Python\index.py", line 38, in <module>
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  titles, urls, count= search_page(driver)
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  File "C:\Users\yagla\Program_lessons\Python\index.py", line 24, in search_page
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- title_list.append(class_name.find_element_by_class_name("LC20lb DKV0Md"))
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+ title_list.append(class_name.find_element_by_class_name("LC20lb DKV0Md").text)
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  File "C:\Users\yagla\AppData\Local\Programs\Python\Python39\lib\site-packages\selenium\webdriver\remote\webelement.py", line 398, in find_element_by_class_name
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  return self.find_element(by=By.CLASS_NAME, value=name)
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  File "C:\Users\yagla\AppData\Local\Programs\Python\Python39\lib\site-packages\selenium\webdriver\remote\webelement.py", line 658, in find_element
@@ -88,5 +88,4 @@
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  File "C:\Users\yagla\AppData\Local\Programs\Python\Python39\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 242, in check_response
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  raise exception_class(message, screen, stacktrace)
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  selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element: {"method":"css selector","selector":".LC20lb DKV0Md"}
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-
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  (Session info: chrome=87.0.4280.88)

2

コンソールに書かれている情報を追加しました。

2020/12/19 07:51

投稿

nnnnnnn-kkkkkk
nnnnnnn-kkkkkk

スコア39

title CHANGED
File without changes
body CHANGED
@@ -67,4 +67,26 @@
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  wb.save("scraping.xlsx")
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- ```
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+ ```
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+ 実行すると以下のように出力されます。
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+ > 引用テキスト
73
+ DevTools listening on ws://127.0.0.1:49192/devtools/browser/ed2754e1-b7b2-4f70-9563-6e9ebf346065
74
+ [14264:7080:1219/163616.006:ERROR:device_event_log_impl.cc(211)] [16:36:16.005] USB: usb_device_handle_win.cc:1020 Failed to read descriptor from node connection: システムに接続されたデバイスが機能していません。 (0x1F)
75
+ Traceback (most recent call last):
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+ File "C:\Users\yagla\Program_lessons\Python\index.py", line 38, in <module>
77
+ titles, urls, count= search_page(driver)
78
+ File "C:\Users\yagla\Program_lessons\Python\index.py", line 24, in search_page
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+ title_list.append(class_name.find_element_by_class_name("LC20lb DKV0Md"))
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+ File "C:\Users\yagla\AppData\Local\Programs\Python\Python39\lib\site-packages\selenium\webdriver\remote\webelement.py", line 398, in find_element_by_class_name
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+ return self.find_element(by=By.CLASS_NAME, value=name)
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+ File "C:\Users\yagla\AppData\Local\Programs\Python\Python39\lib\site-packages\selenium\webdriver\remote\webelement.py", line 658, in find_element
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+ return self._execute(Command.FIND_CHILD_ELEMENT,
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+ File "C:\Users\yagla\AppData\Local\Programs\Python\Python39\lib\site-packages\selenium\webdriver\remote\webelement.py", line 633, in _execute
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+ return self._parent.execute(command, params)
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+ File "C:\Users\yagla\AppData\Local\Programs\Python\Python39\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 321, in execute
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+ self.error_handler.check_response(response)
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+ File "C:\Users\yagla\AppData\Local\Programs\Python\Python39\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 242, in check_response
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+ raise exception_class(message, screen, stacktrace)
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+ selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element: {"method":"css selector","selector":".LC20lb DKV0Md"}
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+
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+ (Session info: chrome=87.0.4280.88)

1

コードの修正

2020/12/19 07:41

投稿

nnnnnnn-kkkkkk
nnnnnnn-kkkkkk

スコア39

title CHANGED
File without changes
body CHANGED
@@ -25,10 +25,10 @@
25
25
 
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  scraping_count = 0 #確認用変数
27
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  while page_number <= page_number_max:
28
- class_group = driver.find_elements_by_name("rc") #クラス名だけ探す
28
+ class_group = driver.find_elements_by_class_name("rc") #クラス名だけ探す
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  for class_name in class_group:
30
- title_list.append(class_name.find_element_by_name("LC20lb DKV0Md"))
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+ title_list.append(class_name.find_element_by_class_name("LC20lb DKV0Md"))
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- url_list.append(class_name.find_element_by_name("a").get_attribute("href"))
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+ url_list.append(class_name.find_element_by_tag_name("a").get_attribute("href"))
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  scraping_count += 1
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  if driver.find_elements_by_name("pnnext") == []: #次のページがなかったらループを抜け出す