[py] add docstring for InvalidElementStateException
closes
@@ -124,6 +124,9 @@ class StaleElementReferenceException(WebDriverException):
class InvalidElementStateException(WebDriverException):
"""
+ Thrown when a command could not be completed because the element is in an invalid state.
+
+ This can be caused by attempting to clear an element that isn't both editable and resettable.
"""
pass
