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annotate bin/recompress @ 94:9790bc126ea6

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Epic simplified error handling in true try/except/finally spirit.
author Edho Prima Arief <edho@myconan.net>
date Thu, 14 Jul 2011 00:49:33 +0700
parents 4f954c1e2fdc
children a5324d2cc0eb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
Edho Prima Arief <edho@myconan.net>
parents:
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1 #!/usr/bin/env python
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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2
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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3 import sys, os
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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4 from PIL import Image
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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5
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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6
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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7 # return codes:
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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8 # 0 = ok
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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9 # 1 = error opening file (not an image, not a file, unreadable or whatever)
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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10 # 2 = error saving file (no write permission)
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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11 # 3 = not a png file
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
Edho Prima Arief <edho@myconan.net>
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12 def repng(filename):
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4f954c1e2fdc Stop being pretentious and only return 0 or 1 in case of success or failure. Everything else is handled by exception handler.
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13 im = Image.open(filename)
4f954c1e2fdc Stop being pretentious and only return 0 or 1 in case of success or failure. Everything else is handled by exception handler.
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14 if im.format == "PNG":
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9790bc126ea6 Epic simplified error handling in true try/except/finally spirit.
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15 im.save(filename, "PNG", optimize=1)
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4f954c1e2fdc Stop being pretentious and only return 0 or 1 in case of success or failure. Everything else is handled by exception handler.
Edho Prima Arief <edho@myconan.net>
parents: 92
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16 else:
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9790bc126ea6 Epic simplified error handling in true try/except/finally spirit.
Edho Prima Arief <edho@myconan.net>
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17 raise Exception("Not a PNG image file")
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03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
Edho Prima Arief <edho@myconan.net>
parents:
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18
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
Edho Prima Arief <edho@myconan.net>
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19 def hbytes(inbyte):
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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20 units = ["B", "kB", "MB", "GB", "TB", "PB"]
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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21 outbyte = float(inbyte)
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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22 current_unit = 0
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
Edho Prima Arief <edho@myconan.net>
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23 while outbyte > 1000:
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
Edho Prima Arief <edho@myconan.net>
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24 outbyte /= 1000
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
Edho Prima Arief <edho@myconan.net>
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25 current_unit += 1
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
Edho Prima Arief <edho@myconan.net>
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26 return "%.2f %s" % (outbyte, units[current_unit])
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
Edho Prima Arief <edho@myconan.net>
parents:
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27
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
Edho Prima Arief <edho@myconan.net>
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28 if __name__ == "__main__":
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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29 for filename in sys.argv[1:]:
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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30 print "Recompressing %s:" % filename,
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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31 sys.stdout.flush()
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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32 try:
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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33 byte_orig = os.path.getsize(filename)
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9790bc126ea6 Epic simplified error handling in true try/except/finally spirit.
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34 repng(filename)
9790bc126ea6 Epic simplified error handling in true try/except/finally spirit.
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35 byte_new = os.path.getsize(filename)
9790bc126ea6 Epic simplified error handling in true try/except/finally spirit.
Edho Prima Arief <edho@myconan.net>
parents: 93
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36 print "OK (%s => %s, %.2f%% saving)" % (hbytes(byte_orig), hbytes(byte_new), (byte_orig - byte_new)*100/float(byte_orig)),
9790bc126ea6 Epic simplified error handling in true try/except/finally spirit.
Edho Prima Arief <edho@myconan.net>
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37 re = 0
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03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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38 except:
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4f954c1e2fdc Stop being pretentious and only return 0 or 1 in case of success or failure. Everything else is handled by exception handler.
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39 print "Failed",
4f954c1e2fdc Stop being pretentious and only return 0 or 1 in case of success or failure. Everything else is handled by exception handler.
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40 print "(%s: %s)" % (sys.exc_type, sys.exc_value),
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03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
Edho Prima Arief <edho@myconan.net>
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41 re = 1
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9790bc126ea6 Epic simplified error handling in true try/except/finally spirit.
Edho Prima Arief <edho@myconan.net>
parents: 93
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42 finally:
9790bc126ea6 Epic simplified error handling in true try/except/finally spirit.
Edho Prima Arief <edho@myconan.net>
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43 print "[%s]" % re
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03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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44