<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def wait_until_element_is_clickable(self, locator, timeout=None):
 		"""Clicks the element specified by `locator` until the operation succeeds. This should be 		used with buttons that are generated in real-time and that don't have their click handling available 		immediately. This keyword avoids unclickable element exceptions. 		| =Argument= | =Description= | =Example= | 		| locator | Selenium 2 element locator(s) | id=MyId | 		| timeout | maximum time to wait, if set to ${None} it will use Selenium's default timeout | 5s |"""


		self._wait_until_no_error(timeout, self._wait_for_click_to_succeed, locator)