What is the usage of "yield" in python?

Which text format is this, "the text is transcribed exactly as it sounds and includes all the utterances of the speakers. "?

State 7 common key's for every keyboard

Janice usually works on a particular workbook that contains all business related data. she decides to keep a backup of all the data in a separate workbook. she opens a new workbook to transfer the data. which option should she use to copy all the data from one workbook to another workbook?