My first Python Program -- Command line Address Book

花了几个小时把A Byte of Python看完以后，我觉得Python确实是简洁易用。

A Byte of Python最后面让大家写一个Command line address book练一下手，

于是就有了我的第一个Python程序了，直接上代码，没什么好解释的。

#!/usr/bin/python2# Filename: address_book.pyimport osimport sysimport cPickle as pimport smtplibimport getpassdef printHelp():    print '''\This is a simple address book.action:  add | insert        -- add/insert a contact  del | delete        -- delete a contact  search | lookup     -- search email by name  send                -- send email to a contact  quit | exit         -- exit this program  help                -- print this help\'''def add(ab):    name = raw_input('\tName\t: ')    email = raw_input('\tEmail\t: ')    ab[name] = emaildef delete(ab):    name = raw_input('\tName\t: ')    del ab[name]def search(ab):    name = raw_input('\tName\t: ')    if name in ab:        print 'Name: %s\tEmail:%s' %(name, ab[name])    else:        print 'No contact %s found' %namedef send(ab):    name = raw_input('\tName\t: ')    if name in ab:        username = raw_input('Username: ')        password = getpass.getpass('Password: ')        From = os.getenv('EMAIL')        if From is None:            From = raw_input('From: ')        To = ab[name]        Subject = raw_input('Subject: ')        Text = raw_input('Text: ')        Text = "" + Text + ""        Header = ["From: " + From,                  "Subject: " + Subject,                  "To: " + To,                  "MIME-Version: 1.0",                  "Content-Type: text/html"]        Header = '\r\n'.join(Header)        Host = 'smtp.gmail.com:587'        server = smtplib.SMTP(Host)        server.starttls()        print 'Login...'        server.login(username, password)        print 'Sending mail...'        server.sendmail(From, To, Header + '\r\n\r\n' + Text)        server.quit()        print 'Finish.'    else:        print 'No contact %s found' %namedef save(ab, filename):    f = file(filename, 'w')    p.dump(ab, f)    f.close()# Script begins hereif len(sys.argv) != 2:    print 'Usage: %s <filename>' %sys.argv[0]    sys.exit()# Initializeab = {}filename = sys.argv[1]if os.path.exists(filename):    if not os.path.isfile(filename):        print '%s is not a file.' %filename        sys.exit()    else:        f = file(filename)        try:            ab = p.load(f)        except EOFError:            pass        except:            print 'load %s error' %filename            f.close()            sys.exit()            f.close()# main loopwhile True:    try:        action = raw_input('Enter action-->:')    except EOFError:        continue    except:        save(ab, filename)    if (action == 'add' or action == 'insert'):        add(ab)    elif (action == 'delete' or action == 'del'):        delete(ab)    elif (action == 'search' or action == 'lookup'):        search(ab)    elif (action == 'send'):        send(ab)    elif (action == 'exit' or action == 'quit'):        save(ab, filename)        sys.exit()    else:        printHelp()