将已删除的数据从网页保存到Excel文件时出现问题

Question

我是使用Python进行抓取的新手。在使用了大量有用的资源后，我能够抓取一个页面的内容。但是，我无法将此数据保存到.csv文件中。

蟒蛇：

import mechanize 
import time
import requests
import csv
from selenium import webdriver
from selenium.webdriver.common.by import By

driver = webdriver.Firefox(executable_path=r'C:\Users\geckodriver.exe')

driver.get("myUrl.jsp")

username = driver.find_element_by_name('USER')
password = driver.find_element_by_name('PASSWORD')

username.send_keys("U")
password.send_keys("P")

main_frame = driver.find_element_by_xpath('//*[@id="Frame"]')
src = driver.switch_to_frame(main_frame)

table = driver.find_element_by_xpath("/html/body/div/div[2]/div[5]/form/div[7]/div[3]/table")
rows = table.find_elements(By.TAG_NAME, "tr")
for tr in rows:
outfile = open("C:/Users/Scripts/myfile.csv", "w")
    with outfile:
        writers = csv.writer(outfile)
        writers.writerows(tr.text)

问题：

只有一行被写入excel文件。但是，当我将tr.text打印到控制台时，会显示所有必需的行。如何将tr元素中的所有文本写入excel文件？

Answer 1

目前你的代码将打开文件，写一行，关闭它，然后在下一行再次打开它并覆盖该行。请考虑以下代码段：

# We use 'with' to open the file and auto close it when done
# syntax is best modified as follows
with open('C:/Users/Scripts/myfile.csv', 'w') as outfile:
    writers = csv.writer(outfile)

    # we only need to open the file once so we open it first
    # then loop through each row to print everything into the open file
    for tr in rows:
        writers.writerows(tr.text)