python读取新闻组内的信息，python读取新闻组,# Hello, thi

python读取新闻组内的信息，python读取新闻组,# Hello, thi

# Hello, this script is written in Python - http://www.python.org## newsarchiver 1.1p - Newsgroup archiver## Purpose:#    This script will download all available message from the desired Usenet group#    and save them as plain text files. Usefull for bulk group archiving.## Usage:##    Syntaxe   : python newsarchiver.py <groupname> [firstArticle]##      where   groupname is the group name (eg. comp.lang.python)#              firstArticle is the article number to fetch from (optional)##    Example 1 : python newsarchiver.py comp.lang.python#                (fetch all article available from comp.lang.python)##    Example 2 : python newsarchiver.py comp.lang.python 108224#                (fetch all article available from comp.lang.python#                 starting with article number 108224)##    Password will be asked when the script is run.##    Server name, login and destination directory are hardcoded.#    Tweak the lines below the 'import' statement to suit your needs.#    Variable names should be self-explanatory.##    Then run this script with and enter your password for the corresponding login.#    This script will then connect to news server and start fetching messages.##    You can stop this script at anytime (break with CTRL+C)#    and re-run it later to continue to fetch messages.#    This script will not fetch message it has already fetched.##    All messages will be saved as individual files in the form:#        groupname_messageNumber#    (with dots replaced by underscores)#    ( eg : comp_lang_python_104208 )##    Keep in mind that 'messageNumber' is server-dependant.#    (If you change newsserver, the messageNumber will be different : you will#    have to erase all files and fetch them all to have a coherent fileset)#    The messageNumber matches the Xref reference number in each message.##    Group must exist on server.## Changes:#    1.0p : - first version#    1.1p : - added group name and first article number as command-line parameters.#           - added help screen## Author's comments:#    Oh my, I wouldn't beleive this would be so easy to program... thanks to Python !## Credits:#    I created this script for 2 purposes:#        - train Python programming (this is one of my first Python scripts)#        - archive comp.lang.python and other interesting newsgroups.##    This author of this script is Sebastien SAUVAGE <sebsauvage at sebsauvage dot net>#                                  http://sebsauvage.net#    Other quick & dirty Python stuff is likely to be available at http://sebsauvage.net/python/## Legal:#   This script is public domain. Feel free to re-use and tweak the code.#import os.path,nntplib,string,getpass,sysdestination = 'c:\\ngarchive\\'   # do not forget the trailing [back]slash !newsserver  = '127.0.0.1'loginname   = 'sebsauvage'if len( sys.argv ) < 2:    print '>>> newsArchiver 1.1p\n'    print '    *** IMPORTANT ***'    print '    See comments in code for more information before running this script !'    print '    (News server address and login name are hardcoded :'    print '     you need to tailor them before using this script.)'    print '    News server',newsserver,"will be used with login '"+loginname+"'"    print '    Destination path is',destination,'\n'    print '    Syntax    : python newsarchiver.py <groupname> [firstArticle]\n'    print '    Example 1 : python newsarchiver.py comp.lang.python'    print '                (fetch all article available from comp.lang.python)\n'    print '    Example 2 : python newsarchiver.py comp.lang.python 108224'    print '                (fetch all article available from comp.lang.python'    print '                 starting with article number 108224)\n'    sys.exit()groupName   = sys.argv[1]firstArticle = 0if len( sys.argv ) > 2:    try:        firstArticle = int(sys.argv[2])    except:        print 'Error : firstArticle parameters must be numeric.'    sys.exit()loginpassword = getpass.getpass('>>> Please enter password for login '+loginname+'@'+newsserver+' : ')print '>>> Connecting to news server',newsserver,'...'try:    ns = nntplib.NNTP(newsserver,119,loginname,loginpassword)except:    print '>>> Could not connect to news server.'else:    print '>>> News server welcomes us:'    print ns.getwelcome()    print '>>> Accessing group', groupName    try:        group = ns.group(groupName)    except:        print '>>> Could not open group',groupName    else:        count = group[1]  # nb of articles available on server        first = group[2]  # ID of first available article        last =  group[3]  # ID of last available article        print '>>>    Article count :',count        print '>>>    First         :',first        print '>>>    Last          :',last    if (firstArticle > int(first)) and (firstArticle <= int(last)):        first = str(firstArticle)        print '>>> Fetching from article',first        for articleNumber in range(int(first),int(last)+1):            fileName = destination+string.replace(groupName+'.'+str(articleNumber),'.','_')            if not os.path.isfile( fileName ):                print '>>> Fetching article',articleNumber,'out of',last,'from',groupName                try:                    article = ns.article(str(articleNumber))                except:                    print '>>> Could not fetch article',articleNumber                else:                    f=open(fileName, 'w+')                    for line in article[3]:                        f.write(line+'\n')                    f.close()    print '>>> Closing connection with news server...'    ns.quit()