Simple python code for maya

i have a rig in maya 2018. In a control there's an attribute that allows to follow or not, certain part of the body, but when this attribute is turned on or off the position changes, I need a code that corrects this error and this part of the body remains in place once animated. The code follows the idea of an a ik / fk swich. Only can use [login to view URL] The code must contain notes and indications I need a video of the execution of the code.