Threading и selenium

import threading
from queue import Queue
from selenium import webdriver
 
#driver = webdriver.PhantomJS(executable_path=r'C:\phantomjs-2.1.1-windows\bin\phantomjs.exe')
#driver = webdriver.Firefox(executable_path=r'C:\geckodriver\geckodriver.exe')
 
class visiter(threading.Thread):
    def worker():
        url = my_urls.get()
        driver = webdriver.Firefox(executable_path=r'C:\geckodriver\geckodriver.exe')
        driver.get(url)
        urls.task_done()
 
urls = ['https://www.python.org/',
        'https://www.cyberforum.ru/',
        'http://deer.io/',
        'https://www.google.com.ua/'
        ]
 
my_urls = Queue()
 
for url in urls:
    my_urls.put(url)
 
thread1 = visiter()
thread2 = visiter()
 
thread1.start()
thread2.start()

thread1 = visiter.worker()
thread2 = visiter.worker()]

my_urls.task_done()

from multiprocessing import Pool
 
def printer(word):
    print(word)
 
words = ['green', 'blue', 'yellow', 'pink']
pool = Pool(5)
pool.map(printer, words)

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\Глеб\AppData\Local\Programs\Python\Python35\lib\multiprocessing\spawn.py", line 106, in spawn_main
    exitcode = _main(fd)
  File "C:\Users\Глеб\AppData\Local\Programs\Python\Python35\lib\multiprocessing\spawn.py", line 115, in _main
    prepare(preparation_data)
  File "C:\Users\Глеб\AppData\Local\Programs\Python\Python35\lib\multiprocessing\spawn.py", line 226, in prepare
    _fixup_main_from_path(data['init_main_from_path'])
  File "C:\Users\Глеб\AppData\Local\Programs\Python\Python35\lib\multiprocessing\spawn.py", line 278, in _fixup_main_from_path
    run_name="__mp_main__")
  File "C:\Users\Глеб\AppData\Local\Programs\Python\Python35\lib\runpy.py", line 254, in run_path
    pkg_name=pkg_name, script_name=fname)
  File "C:\Users\Глеб\AppData\Local\Programs\Python\Python35\lib\runpy.py", line 96, in _run_module_code
    mod_name, mod_spec, pkg_name, script_name)
  File "C:\Users\Глеб\AppData\Local\Programs\Python\Python35\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Users\Глеб\Desktop\REALLY_MULTIPROCESSING!.py", line 8, in <module>
    pool = Pool(5)
  File "C:\Users\Глеб\AppData\Local\Programs\Python\Python35\lib\multiprocessing\context.py", line 118, in Pool
    context=self.get_context())
  File "C:\Users\Глеб\AppData\Local\Programs\Python\Python35\lib\multiprocessing\pool.py", line 168, in __init__
    self._repopulate_pool()
  File "C:\Users\Глеб\AppData\Local\Programs\Python\Python35\lib\multiprocessing\pool.py", line 233, in _repopulate_pool
    w.start()
  File "C:\Users\Глеб\AppData\Local\Programs\Python\Python35\lib\multiprocessing\process.py", line 105, in start
    self._popen = self._Popen(self)
  File "C:\Users\Глеб\AppData\Local\Programs\Python\Python35\lib\multiprocessing\context.py", line 313, in _Popen
    return Popen(process_obj)
  File "C:\Users\Глеб\AppData\Local\Programs\Python\Python35\lib\multiprocessing\popen_spawn_win32.py", line 34, in __init__
    prep_data = spawn.get_preparation_data(process_obj._name)
  File "C:\Users\Глеб\AppData\Local\Programs\Python\Python35\lib\multiprocessing\spawn.py", line 144, in get_preparation_data
    _check_not_importing_main()
  File "C:\Users\Глеб\AppData\Local\Programs\Python\Python35\lib\multiprocessing\spawn.py", line 137, in _check_not_importing_main
    is not going to be frozen to produce an executable.''')
RuntimeError:
        An attempt has been made to start a new process before the
        current process has finished its bootstrapping phase.
 
        This probably means that you are not using fork to start your
        child processes and you have forgotten to use the proper idiom
        in the main module:
 
            if __name__ == '__main__':
                freeze_support()
                ...
 
        The "freeze_support()" line can be omitted if the program
        is not going to be frozen to produce an executable.

from multiprocessing import Pool
 
def printer(word):
    print(word)
 
if __name__ == '__main__':
    words = ['green', 'blue', 'yellow', 'pink']
    pool = Pool(5)
    pool.map(printer, words)