NameError: global name 'By' is not defined

Problem:

Traceback (most recent call last):
File "seleniumPhantomJS.py", line 153, in
selenium_phantom_web_direct_rtp_create_test("10.65.11.145")
File "seleniumPhantomJS.py", line 118, in selenium_phantom_web_direct_rtp_create_test
isPresent = is_element_present(driver, By.CSS_SELECTOR, "article.notifier-log")
NameError: global name 'By' is not defined
[flemieux@atom makito]$ NameError: global name 'By' is not defined
bash: NameError:: command not found...

Solution:

Add this to the top of your file

from selenium.webdriver.common.by import By