whoami7 - Manager
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proc
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thread-self
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root
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proc
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self
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root
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proc
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self
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root
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usr
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lib64
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python2.7
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Demo
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zlib
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Upload File:
files >> //proc/thread-self/root/proc/self/root/proc/self/root/usr/lib64/python2.7/Demo/zlib/zlibdemo.py
#! /usr/bin/python2.7 # 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 def main(): if len(sys.argv) > 1: filename = sys.argv[1] else: filename = sys.argv[0] print 'Reading', filename f = open(filename, 'rb') # Get the data to compress s = f.read() f.close() # First, we'll compress the string in one step comptext = zlib.compress(s, 1) decomp = zlib.decompress(comptext) print '1-step compression: (level 1)' print ' Original:', len(s), 'Compressed:', len(comptext), print 'Uncompressed:', len(decomp) # Now, let's compress the string in stages; set chunk to work in smaller steps chunk = 256 compressor = zlib.compressobj(9) 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()
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