Write a program which uses the capabilities of shelved objects. The program will maintain a telephone database. The commands to use the database are as follows:

whois phone-number Find the information associated with a phone number

add phone-number information Add information to a phone number listing in the database

search keyword Find all entries which include keyword.

quit Exit the application.

some valid commands:

add 2162215680 Fred Smith

add 2063607788 Roberta Flores

quit

subsequent sessions might be:

whois 2162215680

search Flores

search fred

add 2162215680 Owes me $50.

Quit

commands are read in as strings and the line is parsed into command and arguments

Telephone Database Example 1

Psuedo Code

import shelve

main()

try: ##open a shelved object

phoneDB = shelve.open(SomeName)

except IOError:

## If there are problems opening that shelved file print an error

else:

## this else will continue to run the program if the shelve file

## exists

## print the menu specified above as to the possible commands

## prompt user for command cmd = input(Command: )

## If the command is not quit while cmd != quit:

## use the string split method to parse out the command

words = cmd.split()

## get the operating command, the first word if words[0] == whois:

try: ##just a non-specified block

print(words[1], phoneDB[words[1]]) except:

print an error elif words[0] == add:

##use the get() function or the has_key() function

## for all the words in words from [2:] add to the end of the

## value for that key tmpData = phoneDB.get(words[1], -> ) for w in words[2:]: tmpData = tmpData + + w phoneDB[words[1]] = tmpData elif words[0] == search: for w in phoneDB.keys():

if phoneDB[w].find(words[1]) >= 0:

print(w, phoneDB[w]) else:

## just print that there is no command by that name

##get another command

cmd = input(Command: )

close phoneDB

return

:CSCCSemesterslCSCI 1511\Projects\TelephoneDatabase>c:\Python31\python.exe telefonedb.py Commands are whois, add, search and quit ommand: whois 345 rror finding 345 ommand: add 345 Teddy Richter ommand: whois 345 345 Teddy Richter ommand: add 678 Alice Carswe11 command: add 345 lives in Canton, OH command: add 678 ives in Cleveland, OH command: whois 678 678 Alice Carswell 1ives in cleveland, OH command: search lives 345 Teddy Richter 1ives in Canton, OH 678 Alice Carswel1lives in Cleveland, OH command: search Canton 345 Teddy Richter lives in Canton, OH command: quit 8 8 E:cSccSemesters\CSCI 1511 Projects\TelephoneDatabase dir Volume in drive E is Portable Archive 1 Volume Serial Number is 6035-33F8 Directory of E:\cscc\Semesters\cSCI 1511\Projects\TelephoneDatabase 10/07/2012 11:22 PM

10/07/2012 11:22 PM 10/07/2012 11:22 PM 10/07/2012 11:22 PM 10/07/2012 11:22 PM 10/07/2012 11:07 PM 34 phoneinfo.bak 562 phoneinfo.dat 34 phoneinfo.dir 1,292 telefonedb.py 0 4 File(s) 2 Dir(s) 980,813,987,840 bytes free ,922 bytes E:CSCCSemesters\CSCI 1511\ProjectsTelephoneDatabase>