如何將while回圈中的串列附加到python中的同一串列中-selenium

簡而言之，我的問題是我想從“n”個郵箱中獲取收到的訊息并將郵箱（及其訊息）一個接一個地附加到彼此，然后我想作為資料幀列印到一個 excel 檔案中. （例如 n =5）

郵箱串列 = ['mailbox_1','mailbox_2','mailbox_3','mailbox_4','mailbox_5']

這是我的代碼，適用于一個郵箱的內容：

i = 0  # starting number of mailboxes
while i < len(mailbox_list): # I want to get messages for all mailboxes one by one 
    try:
        # get the message content 
        rm_content = driver.find_element(By.XPATH, '//*[@id="content"]/messages/div[2]/div/div/table')
        time.sleep(1)
        messages = (rm_content.text.split('\n')) # these are the messages 
        print('Messages found')
        
        # add these messages to a list
        msg_list = [messages[i:i   3] for i in range(2, len(messages), 3)]  
        # (!!!) this list contains the messages for 1 mailbox that I want to append to the next item in the while loop
        
        # use a dataframe for messages
        df_msg_list = pd.DataFrame(msg_list)
        df_msg_list.columns = ['Sender', 'Content', 'Date']
        df_msg_list[['Inbox', 'Query_Date']] = pd.DataFrame([[get_key(f'{mailbox_list[i]}'), date]], index=df_msg_list.index)
        print(df_msg_list)

        # write into excel
        writer = pd.ExcelWriter(messages_excel, engine='xlsxwriter')
        df_msg_list.to_excel(writer, sheet_name=f'{date[0:10]}', header=True, index=False)
        writer.save()
        
    except NoSuchElementException:
        pass # exception handling
        print('No messages found')
    
    i=i 1

有人可以幫助我如何將 msg_list 附加到 while 回圈中的下一個專案（下一個 msg_list）？

uj5u.com熱心網友回復：

您可以定義并保留一些全域變數，讓我們將其total_msg_list從回圈中呼叫，并將回圈中的當前值附加msg_list到該全域變數中。
像這樣的東西：

total_msg_list = []
i = 0  # starting number of mailboxes
while i < len(mailbox_list): # I want to get messages for all mailboxes one by one 
    try:
        # get the message content 
        rm_content = driver.find_element(By.XPATH, '//*[@id="content"]/messages/div[2]/div/div/table')
        time.sleep(1)
        messages = (rm_content.text.split('\n')) # these are the messages 
        print('Messages found')
        
        # add these messages to a list
        msg_list = [messages[i:i   3] for i in range(2, len(messages), 3)]  
        total_msg_list.append(msg_list)
        
        # use a dataframe for messages
        df_msg_list = pd.DataFrame(msg_list)
        df_msg_list.columns = ['Sender', 'Content', 'Date']
        df_msg_list[['Inbox', 'Query_Date']] = pd.DataFrame([[get_key(f'{mailbox_list[i]}'), date]], index=df_msg_list.index)
        print(df_msg_list)

        # write into excel
        writer = pd.ExcelWriter(messages_excel, engine='xlsxwriter')
        df_msg_list.to_excel(writer, sheet_name=f'{date[0:10]}', header=True, index=False)
        writer.save()
        
    except NoSuchElementException:
        pass # exception handling
        print('No messages found')
    
    i=i 1
#now, after the loop completed you can see the final content of total_msg_list
print(total_msg_list)

標籤：

上一篇：訊息：無效選擇器：xpath運算式的結果是：[objectText]。它應該是一個元素

下一篇：我怎樣才能讓selenium與Fivethirtyeight搜索欄進行互動？