Automated testing process js calendar control

Element to it as an example:

　　<input type="text" name="deadline" id="deadline" value="" class="form-control form-date" autocomplete="off">

　　Note: dr browser objects

    Thinking 1: First remove a read-only attribute js, then directly enter the desired date

Js removed by way of a read-only attribute: 
　　　　js = "document.getElementById ( 'DEADLINE') .removeAttribute ( 'Readonly') ;"   
　　　　dr.execute_script (js)

Js read-only attribute is removed with two ways: 
　　　　js = "document.getElementById ( 'DEADLINE') .ReadOnly = to false ;" 
　　　　dr.execute_script (js) 
Direct Input: 
　　　　dr.find_element_by_id ( "DEADLINE") Clear () # to empty. input box 
　　　　dr.find_element_by_id ( "deadline") send_keys ( "2020-02-25") # again directly enter the date input box. 

idea 2: first remove a read-only attribute js, then with the calendar control value js date to be desired

 with the value js desired date to control:

　　　js_value = "document.getElementById('deadline').value='2020-02-25'"
　　　dr.execute_script(js_value)