Delete adaptive_arithmetic_compress.py

# 

# Compression application using adaptive arithmetic coding

# 

# Usage: python adaptive-arithmetic-compress.py InputFile OutputFile

# Then use the corresponding adaptive-arithmetic-decompress.py application to recreate the original input file.

# Note that the application starts with a flat frequency table of 257 symbols (all set to a frequency of 1),

# and updates it after each byte encoded. The corresponding decompressor program also starts with a flat

# frequency table and updates it after each byte decoded. It is by design that the compressor and

# decompressor have synchronized states, so that the data can be decompressed properly.

# 

# Copyright (c) Project Nayuki

# 

# https://www.nayuki.io/page/reference-arithmetic-coding

# https://github.com/nayuki/Reference-arithmetic-coding

# 

import sys

import arithmeticcoding

python3 = sys.version_info.major >= 3

# Command line main application function.

def main(args):

	# Handle command line arguments

	if len(args) != 2:

		sys.exit("Usage: python adaptive-arithmetic-compress.py InputFile OutputFile")

	inputfile  = args[0]

	outputfile = args[1]

	# Perform file compression

	with open(inputfile, "rb") as inp:

		bitout = arithmeticcoding.BitOutputStream(open(outputfile, "wb"))

		try:

			compress(inp, bitout)

		finally:

			bitout.close()

def compress(inp, bitout):

	initfreqs = arithmeticcoding.FlatFrequencyTable(257)

	freqs = arithmeticcoding.SimpleFrequencyTable(initfreqs)

	enc = arithmeticcoding.ArithmeticEncoder(bitout)

	while True:

		# Read and encode one byte

		symbol = inp.read(1)

		if len(symbol) == 0:

			break

		symbol = symbol[0] if python3 else ord(symbol)

		enc.write(freqs, symbol)

		freqs.increment(symbol)

	enc.write(freqs, 256)  # EOF

	enc.finish()  # Flush remaining code bits

# Main launcher

if __name__ == "__main__":

	main(sys.argv[1 : ])