Am 14.04.2014 09:46, schrieb Peter Otten:
You ran into a limitation of the compiler. For us to suggest a workaround you'd have to explain why you want to convert the list returned from buildhuffmantree() into python source code and back.
That list gives the Huffman encoding tree for compressing a given piece of source text. I am writing a Python code to implement an algorithm (not new, being first sketched in the literature since decades but yet having no publically available implementation as far as I am aware) of encryption processing that has Huffman data compression as its major constituent. Now, for good security against cryptanalysis, this list (which has to be included in the ciphertext for decryption by the recipient) has to be well scrambled in some way. I choose to use 8-bit bytes as units for the scrambling. Hence I convert the list to a bytearray for performing scrambling. On decryption I reverse the scrambling and get back the original bytearray and use ast to recover from it the list so as to be able to do the decompression. Hopefully this description is sufficiently clear. M. K. Shen -- https://mail.python.org/mailman/listinfo/python-list
