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#!/usr/bin/env python
import zlib
import subprocess as sp
def deflate(filename, outfile=None, level=6):
f = open(filename)
data = f.read()
f.close()
compress = zlib.compressobj(
level, # level: 0-9
zlib.DEFLATED, # method: must be DEFLATED
-zlib.MAX_WBITS, # window size in bits:
# -15..-8: negate, suppress header
# 8..15: normal
# 16..30: subtract 16, gzip header
zlib.DEF_MEM_LEVEL, # mem level: 1..8/9
0 # strategy:
# 0 = Z_DEFAULT_STRATEGY
# 1 = Z_FILTERED
# 2 = Z_HUFFMAN_ONLY
# 3 = Z_RLE
# 4 = Z_FIXED
)
deflated = compress.compress(data)
deflated += compress.flush()
if outfile != None:
f = open(outfile, 'w')
f.write(deflated)
f.close()
return deflated
def inflate(filename, outfile=None):
f = open(filename)
data = f.read()
f.close()
decompress = zlib.decompressobj(-zlib.MAX_WBITS) # see above
inflated = decompress.decompress(data)
inflated += decompress.flush()
if outfile != None:
f = open(outfile, 'w')
f.write(inflated)
f.close()
return inflated
"""
Convenience function for running a command bash-like
@param command- string version of a command to run on
@param shell- Whether to run this through the shell; used in subprocess.Popen (default: true)
@return Object with properties 'returncode', 'stdout', and 'stderr'
"""
def run_cmd(command, shell=True):
process = sp.Popen(command, shell=shell, stdout = sp.PIPE, stderr = sp.PIPE)
stdout, stderr = process.communicate()
returncode = process.returncode
return {'returncode' : returncode, 'stdout' : stdout, 'stderr' : stderr}
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