#!/usr/bin/python
### an example of how to use a dictionary to store name/number pairs.

def insertName (name, number, book):
    book[name] = number
    return None

def lookUpNumber(name, book):
    if book.has_key(name):
        return book[name]
    else:
        print "Name not found."
        return None

def printAllEntries (book) :
    for k in book :
        print k, book[k]
    return None    


### a simple main program
if __name__ == "__main__" :
    phoneBook = {}
    insertName("brooks", "422-5221", phoneBook)
    insertName("wolber", "422-1234", phoneBook)
    insertName("parr", "422-4321", phoneBook)

    print "Brooks' phone number is: ", lookUpNumber("brooks", phoneBook)
    print "Here are all the entries: "
    printAllEntries(phoneBook)