For this exercise, you are to complete a program that manages and stores names and email addresses in a dictionary as key:value pairs. The Python program displays a menu that lets users look up a person's email address, add a new name and email address, change an existing email address, or delete an existing name and email address. When the user exits the program, the dictionary is saved to a pickle file. Each time the program starts, the contact dictionary is retrieved from the pickle file, if the file exists. Download the attached ex5.txt file, which contains the basic framework for this program, and add your own code to the included function templates to complete the exercise.

File :- https://mega.nz/#!9z5FATaS!S8ILtu4GJRP20Vx26NJZvDv5g6nZQSbyNRGH37xUXtc