当我运行脚本时，出现此错误

    Traceback (most recent call last):
      File "C:\Users\ishaq\AppData\Local\Programs\Python\Python36\lib\site-packages\selenium\webdriver\common\service.py", line 74, in start
        stdout=self.log_file, stderr=self.log_file)
      File "C:\Users\ishaq\AppData\Local\Programs\Python\Python36\lib\subprocess.py", line 707, in __init__
        restore_signals, start_new_session)
      File "C:\Users\ishaq\AppData\Local\Programs\Python\Python36\lib\subprocess.py", line 992, in _execute_child
        startupinfo)
    FileNotFoundError: [WinError 2] The system cannot find the file specified

    During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
      File "C:/Users/ishaq/AppData/Local/Programs/Python/Python36/headless.py", line 9, in <module>
        driver = webdriver.Chrome(executable_path=os.path.abspath("chromedriver"),   chrome_options=chrome_options)
      File "C:\Users\ishaq\AppData\Local\Programs\Python\Python36\lib\site-packages\selenium\webdriver\chrome\webdriver.py", line 62, in __init__
        self.service.start()
      File "C:\Users\ishaq\AppData\Local\Programs\Python\Python36\lib\site-packages\selenium\webdriver\common\service.py", line 81, in start
        os.path.basename(self.path), self.start_error_message)
    selenium.common.exceptions.WebDriverException: Message: 'chromedriver' executable needs to be in PATH. Please see https://sites.google.com/a/chromium.org/chromedriver/home

这是我的剧本

    import os  
    from selenium import webdriver  
    from selenium.webdriver.common.keys import Keys  
    from selenium.webdriver.chrome.options import Options 

    chrome_options = Options()  
    chrome_options.add_argument("--headless")  
    chrome_options.binary_location = 
    r'C:\Users\ishaq\Desktop\chrome\chromedriver.exe'    
    driver = webdriver.Chrome(executable_path=os.path.abspath("chromedriver"),   
    chrome_options=chrome_options)  
    driver.get("http://www.duo.com") 

    magnifying_glass = driver.find_element_by_id("js-open-icon")  
    if magnifying_glass.is_displayed():  
      magnifying_glass.click()  
    else:  
      menu_button = driver.find_element_by_css_selector(".menu-trigger.local")  
      menu_button.click() 

    search_field = driver.find_element_by_id("site-search")  
    search_field.clear()  
    search_field.send_keys("Olabode")  
    search_field.send_keys(Keys.RETURN)  
    assert "Looking Back at Android Security in 2016" in driver.page_source
    driver.close()