blog/Valutakrambod___A_python_and_bitcoin_love_story.html

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   6     <title>Petter Reinholdtsen: Valutakrambod - A python and bitcoin love story</title>
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  14  <h1>
  15      <a href="http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  16
  17  </h1>
  18
  19 </div>
  20
  21
  22     <div class="entry">
  23       <div class="title">Valutakrambod - A python and bitcoin love story</div>
  24       <div class="date">29th September 2018</div>
  25       <div class="body"><p>It would come as no surprise to anyone that I am interested in
  26 bitcoins and virtual currencies.  I've been keeping an eye on virtual
  27 currencies for many years, and it is part of the reason a few months
  28 ago, I started writing a python library for collecting currency
  29 exchange rates and trade on virtual currency exchanges.  I decided to
  30 name the end result valutakrambod, which perhaps can be translated to
  31 small currency shop.</p>
  32
  33 <p>The library uses the tornado python library to handle HTTP and
  34 websocket connections, and provide a asynchronous system for
  35 connecting to and tracking several services.  The code is available
  36 from
  37 <a href="http://github.com/petterreinholdtsen/valutakrambod">github</a>.</p>
  38
  39 </p>There are two example clients of the library.  One is very simple and
  40 list every updated buy/sell price received from the various services.
  41 This code is started by running bin/btc-rates and call the client code
  42 in valutakrambod/client.py.  The simple client look like this:</p>
  43
  44 <p><blockquote><pre>
  45 import functools
  46 import tornado.ioloop
  47 import valutakrambod
  48 class SimpleClient(object):
  49     def __init__(self):
  50         self.services = []
  51         self.streams = []
  52         pass
  53     def newdata(self, service, pair, changed):
  54         print("%-15s %s-%s: %8.3f %8.3f" % (
  55             service.servicename(),
  56             pair[0],
  57             pair[1],
  58             service.rates[pair]['ask'],
  59             service.rates[pair]['bid'])
  60         )
  61     async def refresh(self, service):
  62         await service.fetchRates(service.wantedpairs)
  63     def run(self):
  64         self.ioloop = tornado.ioloop.IOLoop.current()
  65         self.services = valutakrambod.service.knownServices()
  66         for e in self.services:
  67             service = e()
  68             service.subscribe(self.newdata)
  69             stream = service.websocket()
  70             if stream:
  71                 self.streams.append(stream)
  72             else:
  73                 # Fetch information from non-streaming services immediately
  74                 self.ioloop.call_later(len(self.services),
  75                                        functools.partial(self.refresh, service))
  76                 # as well as regularly
  77                 service.periodicUpdate(60)
  78         for stream in self.streams:
  79             stream.connect()
  80         try:
  81             self.ioloop.start()
  82         except KeyboardInterrupt:
  83             print("Interrupted by keyboard, closing all connections.")
  84             pass
  85         for stream in self.streams:
  86             stream.close()
  87 </pre></blockquote></p>
  88
  89 <p>The library client loops over all known "public" services,
  90 initialises it, subscribes to any updates from the service, checks and
  91 activates websocket streaming if the service provide it, and if no
  92 streaming is supported, fetches information from the service and sets
  93 up a periodic update every 60 seconds.  The output from this client
  94 can look like this:</p>
  95
  96 <p><blockquote><pre>
  97 Bl3p            BTC-EUR: 5687.110 5653.690
  98 Bl3p            BTC-EUR: 5687.110 5653.690
  99 Bl3p            BTC-EUR: 5687.110 5653.690
 100 Hitbtc          BTC-USD: 6594.560 6593.690
 101 Hitbtc          BTC-USD: 6594.560 6593.690
 102 Bl3p            BTC-EUR: 5687.110 5653.690
 103 Hitbtc          BTC-USD: 6594.570 6593.690
 104 Bitstamp        EUR-USD:    1.159    1.154
 105 Hitbtc          BTC-USD: 6594.570 6593.690
 106 Hitbtc          BTC-USD: 6594.580 6593.690
 107 Hitbtc          BTC-USD: 6594.580 6593.690
 108 Hitbtc          BTC-USD: 6594.580 6593.690
 109 Bl3p            BTC-EUR: 5687.110 5653.690
 110 Paymium         BTC-EUR: 5680.000 5620.240
 111 </pre></blockquote></p>
 112
 113 <p>The exchange order book is tracked in addition to the best buy/sell
 114 price, for those that need to know the details.</p>
 115
 116 <p>The other example client is focusing on providing a curses view
 117 with updated buy/sell prices as soon as they are received from the
 118 services.  This code is located in bin/btc-rates-curses and activated
 119 by using the '-c' argument.  Without the argument the "curses" output
 120 is printed without using curses, which is useful for debugging.  The
 121 curses view look like this:</p>
 122
 123 <p><blockquote><pre>
 124            Name Pair   Bid         Ask         Spr    Ftcd    Age
 125  BitcoinsNorway BTCEUR   5591.8400   5711.0800   2.1%   16    nan     60
 126        Bitfinex BTCEUR   5671.0000   5671.2000   0.0%   16     22     59
 127         Bitmynt BTCEUR   5580.8000   5807.5200   3.9%   16     41     60
 128          Bitpay BTCEUR   5663.2700         nan   nan%   15    nan     60
 129        Bitstamp BTCEUR   5664.8400   5676.5300   0.2%    0      1      1
 130            Bl3p BTCEUR   5653.6900   5684.9400   0.5%    0    nan     19
 131        Coinbase BTCEUR   5600.8200   5714.9000   2.0%   15    nan    nan
 132          Kraken BTCEUR   5670.1000   5670.2000   0.0%   14     17     60
 133         Paymium BTCEUR   5620.0600   5680.0000   1.1%    1   7515    nan
 134  BitcoinsNorway BTCNOK  52898.9700  54034.6100   2.1%   16    nan     60
 135         Bitmynt BTCNOK  52960.3200  54031.1900   2.0%   16     41     60
 136          Bitpay BTCNOK  53477.7833         nan   nan%   16    nan     60
 137        Coinbase BTCNOK  52990.3500  54063.0600   2.0%   15    nan    nan
 138         MiraiEx BTCNOK  52856.5300  54100.6000   2.3%   16    nan    nan
 139  BitcoinsNorway BTCUSD   6495.5300   6631.5400   2.1%   16    nan     60
 140        Bitfinex BTCUSD   6590.6000   6590.7000   0.0%   16     23     57
 141          Bitpay BTCUSD   6564.1300         nan   nan%   15    nan     60
 142        Bitstamp BTCUSD   6561.1400   6565.6200   0.1%    0      2      1
 143        Coinbase BTCUSD   6504.0600   6635.9700   2.0%   14    nan    117
 144          Gemini BTCUSD   6567.1300   6573.0700   0.1%   16     89    nan
 145          Hitbtc+BTCUSD   6592.6200   6594.2100   0.0%    0      0      0
 146          Kraken BTCUSD   6565.2000   6570.9000   0.1%   15     17     58
 147   Exchangerates EURNOK      9.4665      9.4665   0.0%   16 107789    nan
 148      Norgesbank EURNOK      9.4665      9.4665   0.0%   16 107789    nan
 149        Bitstamp EURUSD      1.1537      1.1593   0.5%    4      5      1
 150   Exchangerates EURUSD      1.1576      1.1576   0.0%   16 107789    nan
 151  BitcoinsNorway LTCEUR      1.0000     49.0000  98.0%   16    nan    nan
 152  BitcoinsNorway LTCNOK    492.4800    503.7500   2.2%   16    nan     60
 153  BitcoinsNorway LTCUSD      1.0221     49.0000  97.9%   15    nan    nan
 154      Norgesbank USDNOK      8.1777      8.1777   0.0%   16 107789    nan
 155 </pre></blockquote></p>
 156
 157 <p>The code for this client is too complex for a simple blog post, so
 158 you will have to check out the git repository to figure out how it
 159 work.  What I can tell is how the three last numbers on each line
 160 should be interpreted.  The first is how many seconds ago information
 161 was received from the service.  The second is how long ago, according
 162 to the service, the provided information was updated.  The last is an
 163 estimate on how often the buy/sell values change.</p>
 164
 165 <p>If you find this library useful, or would like to improve it, I
 166 would love to hear from you.  Note that for some of the services I've
 167 implemented a trading API.  It might be the topic of a future blog
 168 post.</p>
 169
 170 <p>As usual, if you use Bitcoin and want to show your support of my
 171 activities, please send Bitcoin donations to my address
 172 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 173 </div>
 174
 175       <div class="tags">Tags: <a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.</div>
 176
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 187 <h2>Archive</h2>
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 239
 240 </ul></li>
 241
 242 <li>2017
 243 <ul>
 244
 245 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
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 260
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 262
 263 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/11/">November (3)</a></li>
 264
 265 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/12/">December (4)</a></li>
 266
 267 </ul></li>
 268
 269 <li>2016
 270 <ul>
 271
 272 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 273
 274 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 275
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 285
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 287
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 289
 290 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 291
 292 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 293
 294 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 295
 296 </ul></li>
 297
 298 <li>2015
 299 <ul>
 300
 301 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 302
 303 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 304
 305 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 306
 307 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 308
 309 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 310
 311 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 312
 313 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 314
 315 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
 316
 317 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
 318
 319 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
 320
 321 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
 322
 323 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
 324
 325 </ul></li>
 326
 327 <li>2014
 328 <ul>
 329
 330 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 331
 332 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 333
 334 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 335
 336 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 337
 338 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 339
 340 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 341
 342 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 343
 344 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 345
 346 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 347
 348 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 349
 350 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 351
 352 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 353
 354 </ul></li>
 355
 356 <li>2013
 357 <ul>
 358
 359 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 360
 361 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 362
 363 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 364
 365 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 366
 367 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 368
 369 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 370
 371 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 372
 373 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 374
 375 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 376
 377 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
 378
 379 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
 380
 381 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
 382
 383 </ul></li>
 384
 385 <li>2012
 386 <ul>
 387
 388 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 389
 390 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 391
 392 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 393
 394 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 395
 396 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 397
 398 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 399
 400 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 401
 402 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 403
 404 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 405
 406 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 407
 408 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 409
 410 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 411
 412 </ul></li>
 413
 414 <li>2011
 415 <ul>
 416
 417 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 418
 419 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 420
 421 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 422
 423 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 424
 425 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 426
 427 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 428
 429 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 430
 431 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 432
 433 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 434
 435 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 436
 437 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 438
 439 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 440
 441 </ul></li>
 442
 443 <li>2010
 444 <ul>
 445
 446 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 447
 448 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 449
 450 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 451
 452 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 453
 454 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 455
 456 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 457
 458 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 459
 460 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 461
 462 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 463
 464 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 465
 466 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 467
 468 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 469
 470 </ul></li>
 471
 472 <li>2009
 473 <ul>
 474
 475 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 476
 477 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 478
 479 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 480
 481 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 482
 483 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 484
 485 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 486
 487 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 488
 489 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 490
 491 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 492
 493 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 494
 495 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 496
 497 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 498
 499 </ul></li>
 500
 501 <li>2008
 502 <ul>
 503
 504 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 505
 506 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 507
 508 </ul></li>
 509
 510 </ul>
 511
 512
 513
 514 <h2>Tags</h2>
 515 <ul>
 516
 517  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (16)</a></li>
 518
 519  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 520
 521  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 522
 523  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
 524
 525  <li><a href="http://people.skolelinux.org/pere/blog/tags/betalkontant">betalkontant (8)</a></li>
 526
 527  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (11)</a></li>
 528
 529  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (17)</a></li>
 530
 531  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
 532
 533  <li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
 534
 535  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (168)</a></li>
 536
 537  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (158)</a></li>
 538
 539  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian-handbook">debian-handbook (4)</a></li>
 540
 541  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (11)</a></li>
 542
 543  <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (17)</a></li>
 544
 545  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (26)</a></li>
 546
 547  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
 548
 549  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (411)</a></li>
 550
 551  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
 552
 553  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (14)</a></li>
 554
 555  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (34)</a></li>
 556
 557  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
 558
 559  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (20)</a></li>
 560
 561  <li><a href="http://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
 562
 563  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (42)</a></li>
 564
 565  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (16)</a></li>
 566
 567  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (22)</a></li>
 568
 569  <li><a href="http://people.skolelinux.org/pere/blog/tags/kodi">kodi (4)</a></li>
 570
 571  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
 572
 573  <li><a href="http://people.skolelinux.org/pere/blog/tags/lego">lego (4)</a></li>
 574
 575  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
 576
 577  <li><a href="http://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
 578
 579  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
 580
 581  <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
 582
 583  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (42)</a></li>
 584
 585  <li><a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (12)</a></li>
 586
 587  <li><a href="http://people.skolelinux.org/pere/blog/tags/noark5">noark5 (17)</a></li>
 588
 589  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (307)</a></li>
 590
 591  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (196)</a></li>
 592
 593  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (37)</a></li>
 594
 595  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
 596
 597  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (75)</a></li>
 598
 599  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (111)</a></li>
 600
 601  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (2)</a></li>
 602
 603  <li><a href="http://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
 604
 605  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
 606
 607  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
 608
 609  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (12)</a></li>
 610
 611  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
 612
 613  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (7)</a></li>
 614
 615  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
 616
 617  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (56)</a></li>
 618
 619  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
 620
 621  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
 622
 623  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (66)</a></li>
 624
 625  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (6)</a></li>
 626
 627  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (12)</a></li>
 628
 629  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (57)</a></li>
 630
 631  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (4)</a></li>
 632
 633  <li><a href="http://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
 634
 635  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (9)</a></li>
 636
 637  <li><a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri (17)</a></li>
 638
 639  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (73)</a></li>
 640
 641  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
 642
 643  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (42)</a></li>
 644
 645 </ul>
 646
 647
 648     </div>
 649     <p style="text-align: right">
 650  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
 651 </p>
 652
 653   </body>
 654 </html>