[py] fix flake8 failure
[py] fix flake8 failure

joshmgrant/selenium,valfirst/selenium,SeleniumHQ/selenium,SeleniumHQ/selenium,joshmgrant/selenium,valfirst/selenium,valfirst/selenium,titusfortner/selenium,joshmgrant/selenium,valfirst/selenium,valfirst/selenium,valfirst/selenium,SeleniumHQ/selenium,titusfortner/selenium,joshmgrant/selenium,titusfortner/selenium,titusfortner/selenium,valfirst/selenium,titusfortner/selenium,SeleniumHQ/selenium,SeleniumHQ/selenium,joshmgrant/selenium,valfirst/selenium,SeleniumHQ/selenium,SeleniumHQ/selenium,titusfortner/selenium,valfirst/selenium,joshmgrant/selenium,joshmgrant/selenium,valfirst/selenium,joshmgrant/selenium,joshmgrant/selenium,joshmgrant/selenium,valfirst/selenium,joshmgrant/selenium,titusfortner/selenium,SeleniumHQ/selenium,titusfortner/selenium,SeleniumHQ/selenium,titusfortner/selenium,titusfortner/selenium,SeleniumHQ/selenium,titusfortner/selenium,SeleniumHQ/selenium