Python Selenium 调用网页打印机另存 PDF

之前写过一篇文章（Python Selenium 网页长截图/HTML 转 PDF）网页截图转PDF，但以图片形式保存的pdf在阅读时不太友好。网上搜索文章时，发现可以直接调用网页打印机另存为PDF，下面为核心代码，测试浏览器Chrome。

import time,json
from selenium import webdriver
from selenium.webdriver.chrome.service import Service
from webdriver_manager.chrome import ChromeDriverManager

path = r'C:\Users\XXXX\Desktop' # 修改为网页转PDF后要保存的路径

#%% chrome 选项，调用浏览器打印机，另存为pdf
chrome_options = webdriver.ChromeOptions()

settings = {"recentDestinations": [{"id": "Save as PDF",
                                    "origin": "local",
                                    "account": ""
                                    }],
            "selectedDestinationId": "Save as PDF",
            "version": 2,
            "isHeaderFooterEnabled": True,
            # "customMargins": {},
            # "marginsType": 2,
            # "scaling": 100, # 缩放
            # "scalingType": 3,
            # "scalingTypePdf": 3,
            "isLandscapeEnabled":False, #landscape横向，portrait 纵向，若不设置该参数，默认纵向
            "isCssBackgroundEnabled": True,
            "mediaSize": {"height_microns": 297000,
                          "name": "ISO_A4",
                          "width_microns": 210000,
                          "custom_display_name": "A4 210 x 297 mm"
                          },
          }

# chrome_options.add_argument('--headless') #headless模式下，浏览器窗口不可见，可提高效率
chrome_options.add_argument('--enable-print-browser')
chrome_options.add_argument('--kiosk-printing') #静默打印，无需用户点击打印页面的确定按钮

prefs = {'printing.print_preview_sticky_settings.appState': json.dumps(settings),
         'savefile.default_directory': path #此处填写文件保存的路径
        }
chrome_options.add_experimental_option('prefs', prefs)

#%% 打印，编写打印函数
def web_print_save_pdf(url, filename):
    driver = webdriver.Chrome(service=Service(ChromeDriverManager().install()), options=chrome_options)
    
    driver.get(url)
    driver.maximize_window()
    time.sleep(3)
    driver.execute_script('document.title="{}";window.print();'.format(filename)) #利用js修改网页的title，该title最终就是PDF文件名，利用js的window.print可以快速调出浏览器打印窗口，避免使用热键ctrl+P
    driver.close()
    
#%% 使用    
url = "https://python3-cookbook.readthedocs.io/zh-cn/latest/"
filename = 'Python Cookbook 3rd Edition Documentation.pdf'   
    
web_print_save_pdf(url, filename)

参考文章：

1. python之批量打印网页为pdf文件

2. TypeError: WebDriver.init() got multiple values for argument ‘options‘_got multiple values for argument 'options

3. TypeError: WebDriver.init() got multiple values for argument ‘options‘_got multiple values for argument 'options