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POWhat config file format to use for user-friendly strings of arbitrary bytes?
 

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  1. POWhat config file format to use for user-friendly strings of arbitrary bytes?
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    <p>So I made a short Python script to launch files in Windows with ambiguous extensions by examining their <a href="https://en.wikipedia.org/wiki/Magic_number_%28programming%29" rel="nofollow noreferrer">magic number/file signature</a> first:</p> <ul> <li><a href="https://superuser.com/a/317927/13889">https://superuser.com/a/317927/13889</a></li> <li><a href="https://gist.github.com/1119561" rel="nofollow noreferrer">https://gist.github.com/1119561</a></li> </ul> <p>I'd like to compile it to a .exe to make association easier (either using bbfreeze or rewriting in C), but I need some kind of user-friendly config file to specify the matching byte strings and program paths. Basically I want to put this information into a plain text file somehow:</p> <pre><code>magic_numbers = { # TINA 'OBSS': r'%PROGRAMFILES(X86)%\DesignSoft\Tina 9 - TI\TINA.EXE', # PSpice '*version': r'%PROGRAMFILES(X86)%\Orcad\Capture\Capture.exe', 'x100\x88\xce\xcf\xcfOrCAD ': '', #PSpice? # Protel 'DProtel': r'%PROGRAMFILES(X86)%\Altium Designer S09 Viewer\dxp.exe', # Eagle '\x10\x80': r'%PROGRAMFILES(X86)%\EAGLE-5.11.0\bin\eagle.exe', '\x10\x00': r'%PROGRAMFILES(X86)%\EAGLE-5.11.0\bin\eagle.exe', '&lt;?xml version="1.0" encoding="utf-8"?&gt;\n&lt;!DOCTYPE eagle ': r'%PROGRAMFILES(X86)%\EAGLE-5.11.0\bin\eagle.exe', # PADS Logic '\x00\xFE': r'C:\MentorGraphics\9.3PADS\SDD_HOME\Programs\powerlogic.exe', } </code></pre> <p>(The hex bytes are just arbitrary bytes, not Unicode characters.)</p> <p>I guess a .py file in this format works, but I have to leave it uncompiled and somehow still import it into the compiled file, and there's still a bunch of extraneous content like <code>{</code> and <code>,</code> to be confused by/screw up.</p> <p>I looked at YAML, and it would be great except that it requires base64-encoding binary stuff first, which isn't really what I want. I'd prefer the config file to contain hex representations of the bytes. But also ASCII representations, if that's all the file signature is. And maybe also regexes. :D (In case the XML-based format can be written with different amounts of whitespace, for instance)</p> <p>Any ideas?</p>
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    1. COhave you looked at [python-magic](https://github.com/ahupp/python-magic)?
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    2. CO@jterrace: No, but 1. It's probably overkill if you're only dealing with one file extension? 2. libmagic probably doesn't recognize the formats I care about anyway? [Their file format](http://linux.die.net/man/5/magic) seems relevant, though. I didn't realize they handle regexes, too.
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    3. COwhat's nice about libmagic though is that you can add your own custom formats, so you could easily extend it with yours
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