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Core Python Programming Exercises P09-22
9-22.

ZIP Archive Files. The unzip -l command to dump the contents of ZIP archive is boring. Create a Python script called lszip.py that gives additional information such as: the compressed file size, the compressed percentage of each file (by comparing the original and compressed file sizes), and a full time.ctime() timestamp instead of the unzip output (of just the date and HH:MM). Hint: The date_time attribute of an archived file does not contain enough information to feed to time.mktime()... it is up to you!
#!/usr/bin/env python
#-*- coding:utf-8 -*-
#$Id: p0922.py 168 2010-06-29 06:34:01Z xylz $

'''
This is a 'python' study plan for xylz.
Copyright (C)2010 xylz (www.imxylz.info)
'''

import zipfile
import os
import datetime


def list (zip_file,files):
    print "list %s files from %s" % (len(files) if files!='*' else 'total',zip_file)
    
    f_in = zipfile.ZipFile(zip_file, 'r')
    infoes = None
    if '*' == files:
        infoes = f_in.infolist()
    else:
        infoes = []
        for f in files:
            infoes.append(f_in.getinfo(f))
    print "filename:\t\tuncompress\tcompress\tpercent\tcreatetime"
    print "-----------------------------------------"
    total_usize,total_csize = (0,0)
    for info in infoes:
        (year, month, day, hour, minute, second) = info.date_time
        dtime = datetime.datetime(year, month, day, hour, minute, second)
        filename,usize,csize = info.filename,info.file_size,info.compress_size 
        print "%s:\t\t%d\t%d\t%d%%\t%s" % (filename,usize,csize,(csize*100/(usize+0.01)),dtime.ctime())
        total_usize += usize
        total_csize += csize
    f_in.close()

    print "-----------------------------------------"
    print "compressed size %d bytes, uncompressed size %d bytes, %d%%" % (total_csize,total_usize,(total_csize*100/total_usize))
            
        

if __name__ == '__main__':
    import sys
    if len(sys.argv)<2:
        print "List files in zip file"
        print "Usage: %s <zipfile> [files]" % (sys.argv[0],)
        sys.exit(0)
    zip_file = sys.argv[1]
    files = '*'
    if len(sys.argv)>2:
        files = []
        for f in sys.argv[2:]:
            files.append(f)
    list(zip_file,files)


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posted on 2010-06-29 14:56 imxylz 阅读(16872) 评论(0)  编辑  收藏 所属分类: Python

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