Can't download pdf of selenium site, how?

Question

Python

options = webdriver.ChromeOptions()
        options.add_experimental_option('prefs', {
            "download.default_directory": "/home/mirex/PycharmProjects/parser",  
            "download.prompt_for_download": False,  
            "download.directory_upgrade": True,
            "plugins.always_open_pdf_externally": True  # 
        })
        self.driver = webdriver.Chrome(options=options)
        self.driver.get(self.url)
        sleep(3)
        self.driver.quit()

What is the problem? I was told that chrome has a default command for generating pdf. --print-to-pdf=z:/home/
but I don't really understand..