Library instance analysis used by python to obtain image exif information

This article illustrates the library usage of python for obtaining the image exif information. Share with you for your reference. Specific analysis is as follows:

Exif-py is a pure python implementation of the python library to obtain image metadata, the official download address:
http://exif-py.svn.sourceforge.net/viewvc/exif-py/source/EXIF.py? Revision = 19 & view = markup

The following code demonstrates the call method.

# 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 unreadablen"%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

I hope this article has helped you with your Python programming.