python用来获得图片exif信息的库实例分析

本文实例讲述了python用来获得图片exif信息的库用法。分享给大家供大家参考。具体分析如下：

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

下面的代码演示的是调用方法。

# 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

希望本文所述对大家的Python程序设计有所帮助。

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