"""Lab Program 9: Mr Ram stores data of his gift store
in a CSV file name gift.csv in the format :
Gift code, Gift name, and Gift price of the item for his gift store. Write functions to :
1> Add records to the file.Add a header if the file is new.
2> Display all the records, as well as the average gift price.
3> Search for a certain gift code. Display Error , if not found.
3> Update the gift price, given the gift code. Error, if not found"""