HTML Text Field has a Value Populated, Need to assign this textbox value to a Variabl

[rigirish123]

I have Populated the HTML Text Box in child window, this text box has a values from parent Window.
Now I need to get this Value and assigned to Python Variable for doing some actions like splitting the text and display separately

need help on this.

HTML Text Field has a Value Populated, Need to assign this textbox value to a Variable using Python