def encode(text):
Lziv = open('Lziv_'+file,'w')
#text = lz.prep_text(file)
t1 = time.clock()
lztext = lz.encode(text,windowlen)
Lziv.write(lztext)
Lziv.close()
t2 = time.clock()
lztext = lz.prep_text('Lziv_'+file)
t3 = time.clock()
tree = huff.make_tree(lztext)
t4 = time.clock()
h = open('huff_'+file,'w')
t5 = time.clock()
htext = huff.encode(tree,lztext)
#h.write(tree)
h.write(htext)
t6 = time.clock()
h.close
return [t2-t1,t4-t3,t6-t5],tree
def encode(text):
Lziv = open('Lziv_' + file, 'w')
#text = lz.prep_text(file)
t1 = time.clock()
lztext = lz.encode(text, windowlen)
Lziv.write(lztext)
Lziv.close()
t2 = time.clock()
lztext = lz.prep_text('Lziv_' + file)
t3 = time.clock()
tree = huff.make_tree(lztext)
t4 = time.clock()
h = open('huff_' + file, 'w')
t5 = time.clock()
htext = huff.encode(tree, lztext)
#h.write(tree)
h.write(htext)
t6 = time.clock()
h.close
return [t2 - t1, t4 - t3, t6 - t5], tree
def compress(self):
filename, file_extension = os.path.splitext(self.path)
output_path = filename + "_compressed.txt"
with open(self.path, 'r+') as file, open(output_path, 'wb') as output:
text = file.read()
text = text.rstrip()
frequency = self.make_frequency_dict(text)
self.make_heap(frequency)
self.merge_nodes()
self.make_codes()
encoded_text = self.get_encoded_text(text)
padded_encoded_text = self.pad_encoded_text(encoded_text)
b = self.get_byte_array(padded_encoded_text)
output.write(bytes(b))
# Use Lempel Ziv technique too
LempelZiv.modified_compress(b)
print("Compressed")
return output_path
def decompress(self, input_path):
filename, file_extension = os.path.splitext(self.path)
output_path = filename + "_decompressed" + ".txt"
with open(input_path, 'rb') as file, open(output_path, 'w') as output:
bit_string = ""
byte = file.read(1)
while(len(byte) > 0):
byte = ord(byte)
bits = bin(byte)[2:].rjust(8, '0')
bit_string += bits
byte = file.read(1)
xyz = LempelZiv.modified_decompress()
encoded_text = self.remove_padding(bit_string)
decompressed_text = self.decode_text(encoded_text)
output.write(decompressed_text)
print("Decompressed")
return output_path
def decode(file, tree):
f= open('huff_'+file,'r')
text = f.read()
f.close
print lz.decode(huff.decode(tree, text))
lztext = lz.prep_text('Lziv_'+file)
t3 = time.clock()
tree = huff.make_tree(lztext)
t4 = time.clock()
h = open('huff_'+file,'w')
t5 = time.clock()
htext = huff.encode(tree,lztext)
#h.write(tree)
h.write(htext)
t6 = time.clock()
h.close
return [t2-t1,t4-t3,t6-t5],tree
def decode(file, tree):
f= open('huff_'+file,'r')
text = f.read()
f.close
print lz.decode(huff.decode(tree, text))
if __name__ == "__main__":
file = raw_input("File to be encoded?")
text = lz.prep_text(file)
start= time.clock()
times, tree=encode(text)
print times
end = time.clock()
print end-start
decode(file,str(tree))
def decode(file, tree):
f = open('huff_' + file, 'r')
text = f.read()
f.close
print lz.decode(huff.decode(tree, text))
t3 = time.clock()
tree = huff.make_tree(lztext)
t4 = time.clock()
h = open('huff_' + file, 'w')
t5 = time.clock()
htext = huff.encode(tree, lztext)
#h.write(tree)
h.write(htext)
t6 = time.clock()
h.close
return [t2 - t1, t4 - t3, t6 - t5], tree
def decode(file, tree):
f = open('huff_' + file, 'r')
text = f.read()
f.close
print lz.decode(huff.decode(tree, text))
if __name__ == "__main__":
file = raw_input("File to be encoded?")
text = lz.prep_text(file)
start = time.clock()
times, tree = encode(text)
print times
end = time.clock()
print end - start
decode(file, str(tree))
