playwright headless False和True的区别
时间: 2024-01-04 22:03:52 浏览: 248
在使用 Playwright 进行自动化测试时,可以选择在 headless 模式下运行或在非 headless 模式下运行。headless 模式是指运行浏览器时不会显示浏览器界面,而是在后台运行。而非 headless 模式则是会显示浏览器的界面。
在 headless 模式下,浏览器的性能更好,因为它不需要渲染界面,节省了大量的系统资源。这对于一些需要在后台运行的任务来说非常有用,例如自动化测试、爬虫等。
而在非 headless 模式下,可以方便地进行交互式测试和调试,因为可以直接看到浏览器的界面,更容易发现问题和调试代码。
因此,选择 headless 还是非 headless 模式,取决于具体的需求和场景。
相关问题
请优化下面代码:from playwright.sync_api import sync_playwright import time def login(): with sync_playwright() as playwright: browser = playwright.chromium.launch(headless=False) context = browser.new_context() page = context.new_page() time.sleep(3) page.goto("https://www.csdn.net/") time.sleep(3) page.get_by_text("登录", exact=True).click() time.sleep(3) page.frame_locator('iframe[name="passport_iframe"]').get_by_text("密码登录").click() time.sleep(3) page.frame_locator('iframe[name="passport_iframe"]').get_by_placeholder("手机号/邮箱/用户名").click() time.sleep(3) page.frame_locator('iframe[name="passport_iframe"]').get_by_placeholder("手机号/邮箱/用户名").fill("18523861111")
可以使用Playwright提供的wait_for_selector方法来替换多个time.sleep方法,可以提高代码的可读性和稳定性。同时,可以将重复的代码抽象成变量或函数,以便于重复使用和维护。改写后的代码如下:
```python
from playwright.sync_api import sync_playwright
def login():
with sync_playwright() as playwright:
browser = playwright.chromium.launch(headless=False)
context = browser.new_context()
page = context.new_page()
page.goto("https://www.csdn.net/")
login_button_selector = 'text="登录"'
password_login_selector = 'text="密码登录"'
account_input_selector = 'placeholder="手机号/邮箱/用户名"'
page.wait_for_selector(login_button_selector).click()
page.wait_for_selector(password_login_selector).click()
account_input = page.wait_for_selector(account_input_selector)
account_input.click()
account_input.fill("18523861111")
```
这里使用了三个变量来存储选择器,使用wait_for_selector方法替换了time.sleep方法,提高了代码的可读性和稳定性。
playwright下载
playwright中的下载操作相对于selenium来说更简便一些。在playwright中,可以使用`with page.expect_download() as download_info`来等待下载完成,然后通过`download_info.value`获取下载的相关元素,最后通过`download.path()`获取下载的路径。以下是示例代码:
```
import time
from playwright.sync_api import sync_playwright
with sync_playwright() as p:
browser = p.chromium.launch(headless=False)
context = browser.new_context(accept_downloads=True)
page = context.new_page()
# 执行下载操作
with page.expect_download() as download_info:
page.click("button#download-button")
download = download_info.value
path = download.path()
# 打印下载路径
print(path)
```
以上代码中,`page.click("button#download-button")`是执行启动下载的操作,`download_info.value`获取到了下载的相关元素,然后赋值给`download`,最后通过`download.path()`获取下载的路径。
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