http://code.activestate.com/recipes/tags/decompression-dechunking/2016-03-17T12:22:10-07:00ActiveState Code Recipes2016-03-17T12:22:10-07:00Harald Liederhttp://code.activestate.com/recipes/users/4191581/http://code.activestate.com/recipes/580627-decrypt-a-pdf-using-fitz-mupdf-pymupdf/

<p style="color: grey"> Python recipe 580627 by <a href="/recipes/users/4191581/">Harald Lieder</a> (<a href="/recipes/tags/decompression/">decompression</a>, <a href="/recipes/tags/decryption/">decryption</a>, <a href="/recipes/tags/pdf/">pdf</a>, <a href="/recipes/tags/repair/">repair</a>). </p> <p>It's more a code snippet. Shows how to dynamically check whether a PDF is password protected. If it is, decrypt it and save it back to disk un-encrypted.</p>

2009-01-04T04:11:37-08:00Shao-chuan Wanghttp://code.activestate.com/recipes/users/4168519/http://code.activestate.com/recipes/576603-huffman-coding-encoderdeconder/

<p style="color: grey"> Python recipe 576603 by <a href="/recipes/users/4168519/">Shao-chuan Wang</a> (<a href="/recipes/tags/algorithm/">algorithm</a>, <a href="/recipes/tags/compression/">compression</a>, <a href="/recipes/tags/decompression/">decompression</a>, <a href="/recipes/tags/huffman_code/">huffman_code</a>). Revision 2. </p> <p>Please refer to wikipedia: <a href="http://en.wikipedia.org/wiki/Huffman_coding" rel="nofollow">http://en.wikipedia.org/wiki/Huffman_coding</a></p> <p>Huffman coding is an entropy encoding algorithm used for lossless data compression. The term refers to the use of a variable-length code table for encoding a source symbol (such as a character in a file) where the variable-length code table has been derived in a particular way based on the estimated probability of occurrence for each possible value of the source symbol. It was developed by David A. Huffman while he was a Ph.D. student at MIT, and published in the 1952 paper "A Method for the Construction of Minimum-Redundancy Codes".</p>