Sorting photos from your digital camera

#!/usr/bin/env python
''' 
A simple Python script to sort image files into different directories
according to its EXIF tags.

lestercheung AT gmail.com

'''
import os, sys
import datetime

if '__file__' in dir():         # Put EXIF.py on the same directory
    sys.path.append(os.path.dirname(__file__))
import EXIF

from exceptions import Exception

def getctime(filename):
    dt = datetime.datetime.fromtimestamp(os.stat(filename).st_ctime)
    try:
        tags = EXIF.process_file(file(filename, 'rb'))
        dtstr = tags.get('EXIF DateTimeOriginal').printable
        subsecstr = tags.get('EXIF SubSecTimeOriginal').printable
        usec = 0                # microsecond portion of timestamp
        for i in range(len(subsecstr)):
            if 5-i < 1:
                break
            j = subsecstr[i]
            usec += int(j) * 10**(5-i)
        if dtstr:
            dt = datetime.datetime.strptime(dtstr+str(usec), '%Y:%m:%d %H:%M:%S%f')
    except Exception, e:
        sys.stderr.write('error parsing date tag, using file timestamp for %s' % filename)
        sys.stderr.write(str(e))
        sys.stderr.write('\n')

    return dt

def getdstfname(src, dstdir=''):
    dt = getctime(src)

    ext = os.path.basename(src)
    x = src.split('.')
    if len(x) > 1:
        ext = x[-1]
#     fname = dt.strftime('%Y%m%d_%H%M%S%f')
    fname = os.path.basename(src)
    pathname = os.path.join(dstdir, str(dt.year), dt.strftime('%m'), dt.strftime('%d'), fname)
    if os.path.exists(pathname):
        i = 1
        while os.path.exists(pathname):
            pathname = os.path.join(dstdir, str(dt.year), dt.strftime('%m'), dt.strftime('%d'), fname.split()[0]+'-%03d.'%i+ext)
            i+=1
    return pathname



def link_or_copy(src, dst):
    print "link_or_copy(%s, %s)" % (src, dst)
    if os.path.exists(dst):
        print '%s exists! Aborting' % dst
        return
    dstdir = os.path.dirname(dst)
    if not os.path.exists(dstdir):
        os.makedirs(dstdir)
    try:
        os.link(src, dst)
    except OSError, e:          # copy and reset timestamp
        fd = file(dst, 'w')
        fd.write(file(src).read())
        fd.close()
        ctime = getctime(dst)
        from time import mktime
        # this is not precise - see: http://bugs.python.org/issue2736
        atime = mtime = mktime(ctime.timetuple()) # setting all to DateTimeOriginal
        os.utime(dst, (atime, mtime))

    
if __name__ == '__main__':
     srcdir, dstdir = sys.argv[1:3]
     failed_files = []
     copied = 0
     for base, dirs, files in os.walk(srcdir):
         for f in files:
             ff = os.path.join(base,f)
             #print ff
             from exceptions import Exception, OSError
             try:
                 link_or_copy(ff, getdstfname(ff, dstdir=dstdir))
                 copied += 1
             except OSError, e:
                 failed_files.append(ff)
             except Exception, e:
                 raise
     if failed_files:
         print 'failed to link/copy %s files:\n' % len(failed_files)
         for i in failed_files:
             print '  %s' % i

     print 'copied %s files.' % copied

Slow startup for Dictionary.app on MacOSX

... fixed by removing the following 2 directories: ~/Library/Caches/com.apple.DictionaryApp ~/Library/Caches/com.apple.DictionaryServices.