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Put code in a main() function; loosen up the spacing to match current code style

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Andrew M. Kuchling 2006-06-03 23:15:56 +00:00
parent 3725dea9c3
commit 3550613502
1 changed files with 39 additions and 26 deletions
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65
Demo/zlib/zlibdemo.py
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@ -1,35 +1,48 @@
#!/usr/bin/env python #!/usr/bin/env python
# Takes an optional filename, defaulting to this file itself.
# Reads the file and compresses the content using level 1 and level 9
# compression, printing a summary of the results.
import zlib, sys import zlib, sys
if len(sys.argv)>1: filename=sys.argv[1]
else: filename='zlibdemo.py'
print 'Reading', filename
f=open(filename, 'r') # Get the data to compress
s=f.read()
f.close()
# First, we'll compress the string in one step def main():
comptext=zlib.compress(s, 1) if len(sys.argv) > 1:
decomp=zlib.decompress(comptext) filename = sys.argv[1]
else:
filename = sys.argv[0]
print 'Reading', filename
print '1-step compression: (level 1)' f = open(filename, 'rb') # Get the data to compress
print ' Original:', len(s), 'Compressed:', len(comptext), s = f.read()
print 'Uncompressed:', len(decomp) f.close()
# Now, let's compress the string in stages; set chunk to work in smaller steps # First, we'll compress the string in one step
comptext = zlib.compress(s, 1)
decomp = zlib.decompress(comptext)
chunk=256 print '1-step compression: (level 1)'
compressor=zlib.compressobj(9) print ' Original:', len(s), 'Compressed:', len(comptext),
decompressor=zlib.decompressobj() print 'Uncompressed:', len(decomp)
comptext=decomp=''
for i in range(0, len(s), chunk):
comptext=comptext+compressor.compress(s[i:i+chunk])
comptext=comptext+compressor.flush() # Don't forget to call flush()!!
for i in range(0, len(comptext), chunk): # Now, let's compress the string in stages; set chunk to work in smaller steps
decomp=decomp+decompressor.decompress(comptext[i:i+chunk])
decomp=decomp+decompressor.flush()
print 'Progressive compression (level 9):' chunk = 256
print ' Original:', len(s), 'Compressed:', len(comptext), compressor = zlib.compressobj(9)
print 'Uncompressed:', len(decomp) decompressor = zlib.decompressobj()
comptext = decomp = ''
for i in range(0, len(s), chunk):
comptext = comptext+compressor.compress(s[i:i+chunk])
# Don't forget to call flush()!!
comptext = comptext + compressor.flush()
for i in range(0, len(comptext), chunk):
decomp = decomp + decompressor.decompress(comptext[i:i+chunk])
decomp=decomp+decompressor.flush()
print 'Progressive compression (level 9):'
print ' Original:', len(s), 'Compressed:', len(comptext),
print 'Uncompressed:', len(decomp)
if __name__ == '__main__':
main()