On unix systems following the free desktop standards, locate the thumbnail image for any file, if present. Needs Python 2.5.
Python, 38 lines
Download
Copy to clipboard1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | """Get the thumbnail stored on the system.
Should work on any linux system following the desktop standards"""
import hashlib
import os
def get_thumbnailfile(filename):
"""Given the filename for an image,
return the path to the thumbnail file.
Returns None if there is no thumbnail file.
"""
# Generate the md5 hash of the file uri
file_hash = hashlib.md5('file://'+filename).hexdigest()
# the thumbnail file is stored in the ~/.thumbnails/normal folder
# it is a png file and name is the md5 hash calculated earlier
tb_filename = os.path.join(os.path.expanduser('~/.thumbnails/normal'),
file_hash) + '.png'
if os.path.exists(tb_filename):
return tb_filename
else:
return None
if __name__ == '__main__':
import sys
if len(sys.argv) < 2:
print 'Usage ---'
print ' get_thumbnail.py filename'
sys.exit(0)
filename = sys.argv[1]
tb_filename = get_thumbnailfile(filename)
if tb_filename:
print 'Thumbnail for file %s is located at %s' %(
filename, tb_filename)
else:
print 'No thumbnail found'
|
Often one needs the thumbnail for an image file or another kind of document. To avoid multiple programs generating their own thumbnails, the free desktop standards recommend a standard location where thumbnails are stored. This function, determines the path to the thumbnail file. Pass full filename as argument. Returns None if the thumbnail file is not present.
