save_screenshot和get_screenshot_as_file有什么区别
时间: 2023-10-23 17:11:13 浏览: 53
save_screenshot()和get_screenshot_as_file()都是Selenium WebDriver中的截图方法,可以用于截取当前页面的屏幕截图。它们的主要区别在于:
- save_screenshot()方法截图后,将图片保存为二进制文件,并返回二进制数据。可以使用该方法将截图保存在变量中,以便进行后续处理。
- get_screenshot_as_file()方法截图后,将图片保存在文件中,并返回文件路径。可以使用该方法将截图保存在本地磁盘上。
因此,如果需要将截图保存在变量中以进行后续处理,则应该使用save_screenshot()方法;如果需要将截图保存在本地文件中,则应该使用get_screenshot_as_file()方法。
相关问题
driver.get_screenshot_as_file
() is a method in Selenium WebDriver which is used to take a screenshot of the current web page and save it as a file on the local machine.
Syntax:
driver.get_screenshot_as_file(filename)
Parameters:
- filename: The name of the file to which the screenshot will be saved. It should have a .png extension.
Example:
Let's say we want to take a screenshot of the Google homepage and save it as "google.png". Here's how we would do it:
from selenium import webdriver
# Create a new instance of the Firefox driver
driver = webdriver.Firefox()
# Navigate to the Google homepage
driver.get("https://www.google.com")
# Take a screenshot and save it as "google.png"
driver.get_screenshot_as_file("google.png")
# Close the browser
driver.quit()
This will save a screenshot of the Google homepage as "google.png" in the current working directory.
我编写了一个函数爬取快照,需要传入的参数是网址名和给快照命的名,里面调用了get_screenshot_as_file函数,现在由于每个网址爬取的时间长短不一,我现在需要怎样做,才能让每次调用这个函数时,只要过了30秒,就直接爬取下一个网址
你可以使用Python的time模块中的sleep函数,让程序在每次爬取完一个网址后暂停30秒,然后再继续爬取下一个网址。以下是一个示例代码:
```python
import time
from selenium import webdriver
def capture_snapshot(url, filename):
driver = webdriver.Chrome()
driver.get(url)
driver.save_screenshot(filename)
driver.quit()
url_list = ["http://www.example.com", "http://www.google.com", "http://www.yahoo.com"]
for i, url in enumerate(url_list):
filename = "snapshot{}.png".format(i)
capture_snapshot(url, filename)
time.sleep(30)
```
在以上示例代码中,我们使用了一个for循环遍历网址列表,每次调用capture_snapshot函数来爬取快照,并暂停30秒后再爬取下一个网址。你可以根据自己的需要修改代码以适应你的具体情况。