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Selenium TypeError: __init__() got an unexpected keyword argument 'service'

I'm refactoring my app from procedural code to OOP. I am trying to do this Driver class.

UPDATE: this works in Windows but not in Mac.

# IMPORTS
from sys import platform
import os
from os import system

from selenium import webdriver
from selenium.webdriver import Firefox, FirefoxOptions
from selenium.common.exceptions import NoSuchElementException
from selenium.webdriver.common.keys import Keys
from selenium.common.exceptions import TimeoutException
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By
# import Action chains 
from selenium.webdriver.common.action_chains import ActionChains
from selenium.webdriver.support.ui import Select
from selenium.webdriver.firefox.service import Service

class Driver():
    def __init__(self):
        #set executable path to driver
        self.dirname = os.path.dirname(__file__)
        if platform == "win32":
            self.executable_path = os.path.join(self.dirname, 'geckodriver.exe') #must save the gecko file to same directory where python is. path to geckodriver (firefox drive/motor) on your machine
            print("Gecko (Firefox) filepath is: ", self.executable_path)
        if platform == "darwin":
            self.executable_path = os.path.join(self.dirname, 'geckodriver') #must save the gecko file to same directory where python is. path to geckodriver (firefox drive/motor) on your machine
            print("Gecko (Firefox) filepath is: ", self.executable_path)
            
        self.service = Service(self.executable_path) 
            
        self.opts = FirefoxOptions()
        #self.opts.add_argument(f"--width={int(screen_width/4)}")
        #self.opts.add_argument(f"--height={int(screen_height/2)}")

        self.driver = Firefox(service=self.service, options=self.opts)
        
        self.driver.set_window_position(-10, 0)
        
        self.driver.get("https://google.com/")
    
Driver()

This will give me the following error:

Traceback (most recent call last):
  File "/driverClass.py", line 72, in <module>
    Driver()
  File "/driverClass.py", line 66, in __init__
    self.driver = Firefox(service=self.service, options=self.opts)
TypeError: __init__() got an unexpected keyword argument 'service'

Why is this? I'm refactoring my code to OOP. The code worked before when using procedural code.

This is from the working code:

# driver configs
service = Service(executable_path) #pass in path to geckodriver
opts = FirefoxOptions()
#opts.add_argument(f"--width={int(screen_width/4)}")
#opts.add_argument(f"--height={int(screen_height/2)}")
driver = Firefox(service=service, options=opts)

driver.set_window_position(-10, 0)
#driver.set_window_size(int(screen_width/4), int(screen_height))

driver.get("https://google.com/")
Solution

  • This error message...

    TypeError: __init__() got an unexpected keyword argument 'service'

    ...implies that service is an unexpected keyword argument.

    The possible reason, you are still using Selenium v3.x and the keyword argument service wasn't supported.

    Solution

    Since Selenium 4.0 Beta 1:

    Deprecate all but Options and Service arguments in driver instantiation. (#9125,#9128)

    So you need to upgrade to Selenium 4.x

    References

    You can find a couple of relevant detailed discussion in: