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File compression - program 15 Years Ago by catcit … started with one of my colleagues to work on a file compression program based on Huffman coding. I have previously worked with… file compression prgogram 17 Years Ago by gauthamnaggg … need to write a code that compress and uncompresses thegiven file in c.Well i know there are many algorithms available… but couldn't able to find ?.Is there any simple file compression algorithm is available ? [COLOR="Green"][/COLOR] Re: File Compression 18 Years Ago by sneekula …vegaseat;303189]Python offers a number of modules providing easy file compression and decompression. Here are code snippets for two of the… popular compression formats ... zipfile --> [URL]http://www.daniweb.com/code/… simple. Does anyone have a particular preference of a compression format? Re: File Compression 18 Years Ago by vegaseat Python offers a number of modules providing easy file compression and decompression. Here are code snippets for two of the popular compression formats ... zipfile --> [URL]http://www.daniweb.com/code/snippet629.html[/URL] tarfile --> [URL]http://www.daniweb.com/code/snippet630.html[/URL] Need sample code for Text File Compression!!! 16 Years Ago by SlayerX … some help on text file compression.... Text File Compression. The text file compression must be able to …perform the following functions: • Able to compress a text file and generate an index file…and decompressing • Able to show the file size before and after compressed Task: 1… Re: file compression prgogram 17 Years Ago by Salem You mean your googling failed to find any source code you could just use for your homework. This isn't the same as there being no information about compression on the web. There's lots of it. Re: File Compression 18 Years Ago by vegaseat [quote=sneekula;304212]Another question, can zipfile archive several files like tarfile? How would you save the decompresed files?[/quote]An omission on my part, I added another snippet to show you how to pack and unpack files to and from an archived zip file: [URL]http://www.daniweb.com/code/snippet633.html[/URL] Re: Need sample code for Text File Compression!!! 16 Years Ago by Alex Edwards …the numbers to their corresponding characters in the index file. Your index file might look something like this-- [icode] s… your file (that are non-recurring or not consecutive), you may face an expansion instead of a compression when …you try to compress the file. This is just a theory, … Re: Need sample code for Text File Compression!!! 16 Years Ago by Salem Get nice and comfortable, this is a long read [url]http://www.faqs.org/faqs/compression-faq/[/url] Re: Need sample code for Text File Compression!!! 16 Years Ago by Salem … me, can you even write a program to copy a file one character at a time? Or write a program which… can say count the number of 'a' characters in a file? Or even produce a [URL="http://en.wikipedia.org…"]histogram[/URL] showing the distribution of letters in a file? See, having done this, you're half-way there to… Re: Best File Compression Software? 18 Years Ago by HodonKain I've been dealing with file compression for many many years. I've found that Winzip is pretty well rounded. 7zip is very nice as well. Those are the main two I use. If you want even better file compression at the cost of speed, you could try PAQ8. I'm in the process of developing my own program. Fun stuff. Re: Best File Compression Software? 18 Years Ago by HodonKain Staying on the topic of file compression... If you're backing up terrabytes of data, maybe data … Re: File can encrypt data but I want to compress the size of encrypted file also 15 Years Ago by Ancient Dragon File compression/decompression is a pretty complex task. [URL="http://www.thefreecountry.com/sourcecode/compression.shtml"]Here [/URL]are some free libraries. Re: File compression - program 15 Years Ago by hondros Um, the best tutorial that I know of is the one that is included with Python itself, also available at their website. Other than that, just look up the manual for any module you use. GUI-wise, I'd have to go with wxPython, it's very simple and easy to use. I have been using it for about 2 weeks now, no problems with it. I've attemped Tkinter, PyGt… Re: File compression - program 15 Years Ago by jcao219 Good luck! OOP to GUI is a very broad range of topics. For OOP, I guess you can learn it from a tutorial, but practicing by writing code really helps to make you a better programmer. For GUI, just find a good toolkit, i.e. wxPython would be a good one. Just depends on what you prefer. I use IronPython with WPF or WinForms for my GUI creations, … Re: file compression prgogram 17 Years Ago by Jishnu You found the algorithm. That is enough. Go ahead. Re: File can encrypt data but I want to compress the size of encrypted file also 15 Years Ago by gusano79 [QUOTE=Ancient Dragon;1058034]File compression/decompression is a pretty complex task.[/…I want to compress the file encrypted and then decrypt the same original file.[/QUOTE] I recommend that… you compress first, encrypt second. Encryption usually hides the patterns and structure in data that make compression… {Urgent} need help with file compression and decompression 17 Years Ago by j2swift …, 010 to 110 for the 4th most frquent. Compression is achieved replacing bits by 3 bits. Else encode…bit in the accumulator are written to the file. This finished the compression program. To decompress, you read the first… 100 byte, copy them to the decoded file, and … File Compression 18 Years Ago by sneekula Since there is so much discussion on one of the threads on zipping/unzipping files and all the associated incompatibilities, is there a way to do this with Python and cut out the middleman? Re: File Compression 18 Years Ago by sneekula Another question, can zipfile archive several files like tarfile? How would you save the decompresed files? Effect on Compression ration by File size in Zlib 15 Years Ago by blackmagic01021 hello, I have developed a file compression tool using zlib compression library. As the zlib use the deflate and inflate process, does the size of the file effect compression ratio? If it has effect, what is the reason? Thank you. Re: Best File Compression Software? 15 Years Ago by HodonKain … with the normal *.zip file extension. Zipx is suppose to be a better type of compression vs the normal zip. …this one, we will one day achieve "prefect compression" which in my mind is the point where …working and working to achieve the master equation for compression. Maximum compression for the least amount of time. I will have… Re: Best File Compression Software? 17 Years Ago by HodonKain … don't mind the wait. Just drag and drop the file (the one you want to compress) onto the paq806.exe… does all the work. [url]http://cs.fit.edu/~mmahoney/compression/#paq[/url] The latest version is [URL="http://cs….fit.edu/%7Emmahoney/compression/paq8o6.zip"]paq8o6[/URL], released Sept. 28, 2007 by… Re: Need sample code for Text File Compression!!! 16 Years Ago by ArkM 911: [url]http://www.daniweb.com/forums/announcement8-2.html[/url] Sample code needed? Google is your friend!.. Re: Need sample code for Text File Compression!!! 16 Years Ago by SlayerX can giv me a sample?thx or help me with it .....i will learn it myself or u can write comment for me to let me learn it in the code.... Re: Need sample code for Text File Compression!!! 16 Years Ago by MosaicFuneral In the case the you only had to use ASCII values 32-126, you then could share a single byte for two values. You could even use a truth table that points out the positions of a nibble that is really its opposite extended version 128-255. Re: Need sample code for Text File Compression!!! 16 Years Ago by SlayerX oh..thx guys.....but i still cant do it....need some beginning codes...as u know im still beginner....well..hope u can help me thx!! Re: Need sample code for Text File Compression!!! 16 Years Ago by Freaky_Chris [QUOTE=SlayerX;745667]oh..thx guys.....but i still cant do it....need some beginning codes...as u know im still beginner....well..hope u can help me thx!![/QUOTE] You are NOT going to get a code solution. Either give in trying or post what you think you should be doing in words, pseudo-code or some method of displaying what you think you have … Re: Need sample code for Text File Compression!!! 16 Years Ago by SlayerX If i know how to do...do u think i will post here??...jus giv me a starting point......i really dont know how to do only post here... Re: Best File Compression Software? 20 Years Ago by GoreTex I recently downloaded a file that was a 7.19MB RAR file. When I decompressed it, it showed as being a BIN… I've NEVER been able to accomplish that percentage of compression. Is it possible that there is some god-like… compression tool out there that bests every other compression tool by 65%+/-? Any information here…