python获取图片元数据的代码详解编程语言

exif-py是一个纯python实现的获取图片元数据的python库，官方下载地址：


http://exif-py.svn.sourceforge.net/viewvc/exif-py/source/EXIF.py?revision=19&view=markup

# library test/debug function (dump given files) 
if __name__ == '__main__': 
    import sys 
    import getopt 
  
    # parse command line options/arguments 
    try: 
        opts, args = getopt.getopt(sys.argv[1:], "hqsdt:v", ["help", "quick", "strict", "debug", "stop-tag="]) 
    except getopt.GetoptError: 
        usage(2) 
    if args == []: 
        usage(2) 
    detailed = True 
    stop_tag = 'UNDEF' 
    debug = False 
    strict = False 
    for o, a in opts: 
        if o in ("-h", "--help"): 
            usage(0) 
        if o in ("-q", "--quick"): 
            detailed = False 
        if o in ("-t", "--stop-tag"): 
            stop_tag = a 
        if o in ("-s", "--strict"): 
            strict = True 
        if o in ("-d", "--debug"): 
            debug = True 
  
    # output info for each file 
    for filename in args: 
        try: 
            file=open(filename, 'rb') 
        except: 
            print "'%s' is unreadable/n"%filename 
            continue 
        print filename + ':' 
        # get the tags 
        data = process_file(file, stop_tag=stop_tag, details=detailed, strict=strict, debug=debug) 
        if not data: 
            print 'No EXIF information found' 
            continue 
  
        x=data.keys() 
        x.sort() 
        for i in x: 
            if i in ('JPEGThumbnail', 'TIFFThumbnail'): 
                continue 
            try: 
                print '   %s (%s): %s' % / 
                      (i, FIELD_TYPES[data[i].field_type][2], data[i].printable) 
            except: 
                print 'error', i, '"', data[i], '"' 
        if 'JPEGThumbnail' in data: 
            print 'File has JPEG thumbnail' 
        print