User Account

All Pages

Lost, Python Programming

Assignment Help:
Import the sample code below into the Python IDLE and enhance it, run it and debug it. Add features to make this a more realistic database tool by providing for easy data entry and retrieval. Export your successful program to a Python file for later upload to coursenet.

Here is the sample source code:

#!/usr/bin/python
#
# An example from Sean Reifschneider''s Python Tutorial at Linux Expo 98.
#
# Copyright (c) 1998 Sean Reifschneider, tummy.com, ltd.
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# You can contact Sean Reifschneider at
# P.O. Box 270624,
# Fort Collins, CO USA 80527-0624,
# or at [email protected]
#
# Simple phone-number database module

import shelve
import string

UNKNOWN = 0
HOME = 1
WORK = 2
FAX = 3
CELL = 4

class phoneentry:
def __init__(self, name = ''Unknown'', number = ''Unknown'',
type = UNKNOWN):
self.name = name
self.number = number
self.type = type

# create string representation
def __repr__(self):
return(''%s:%d'' % ( self.name, self.type ))

# fuzzy compare or two items
def __cmp__(self, that):
this = string.lower(str(self))
that = string.lower(that)

if string.find(this, that) >= 0:
return(0)
return(cmp(this, that))

def showtype(self):
if self.type == UNKNOWN: return(''Unknown'')
if self.type == HOME: return(''Home'')
if self.type == WORK: return(''Work'')
if self.type == FAX: return(''Fax'')
if self.type == CELL: return(''Cellular'')

class phonedb:
def __init__(self, dbname = ''phonedata''):
self.dbname = dbname;
self.shelve = shelve.open(self.dbname);

def __del__(self):
self.shelve.close()
self.shelve = None

def add(self, name, number, type = HOME):
e = phoneentry(name, number, type)
self.shelve[str(e)] = e

def lookup(self, string):
list = []
for key in self.shelve.keys():
e = self.shelve[key]
if cmp(e, string) == 0:
list.append(e)

return(list)

# if not being loaded as a module, run a small test
if __name__ == ''__main__'':
foo = phonedb()
foo.add(''Sean Reifschneider'', ''970-555-1111'', HOME)
foo.add(''Sean Reifschneider'', ''970-555-2222'', CELL)
foo.add(''Evelyn Mitchell'', ''970-555-1111'', HOME)

print ''First lookup:''
for entry in foo.lookup(''reifsch''):
print ''%-40s %s (%s)'' % ( entry.name, entry.number, entry.showtype() )
print

print ''Second lookup:''
for entry in foo.lookup(''e''):
print ''%-40s %s (%s)'' % ( entry.name, entry.number, entry.showtype() )

Related Discussions:- Lost

While loop, You should use for whenever you can, because  it creates  the s...

You should use for whenever you can, because  it creates  the structure of your  loops clear. Sometimes, however, you require to do an operation various times, but you don't want t

File handling , A program to count how many files are on the file system wh...

A program to count how many files are on the file system which displays summary information regarding the total number of bytes used by all files and a breakdown of the number of b

Conditionals- booleans, Booleans   Before we talk about  conditional...

Booleans   Before we talk about  conditionals, we require  to clarify the Boolean  data  type.  It has two values False and True. Typical statement that have Boolean values

Print vs return, Print vs Return Here are two different method declara...

Print vs Return Here are two different method declarations: def f1(x): print x + 1 def f2(x): return x + 1 What happens when  we call them? >>> f1(3) 4 >>

Internal models, Internal models As we want to create  more and more c...

Internal models As we want to create  more and more complex  machine with  software programs as controllers, we search  that  it is often needful  to create  additional types

Program requests password to display information of author, Write a program...

Write a program that requests a password after the author/program information is displayed. Make the password "hello". The program should then ask the user for their name: if the n

Stuck on homework, There are three seating categories at a stadium. For a s...

There are three seating categories at a stadium. For a softball game, Class A seats cost $15, Class B seats cost $12, and Class C seats cost $9. Write a program that asks how many

Normalize a vector, Normalize a vector Let's imagine we want  to norma...

Normalize a vector Let's imagine we want  to normalize a vector  of three  variables;  that  is to compute a new  vector  of three values,  such that its size  is 1. Here is o

#booleans, #how they work

#how they work

List Assignment, Task This problem creates a list containing names. The li...

Task This problem creates a list containing names. The list of names will be printed, sorted, printed again in the new sorted order, written to a new output file, and searched. Ca

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +91-977-207-8620

Phone: +91-977-207-8620

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd