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annotate service/piNode/piNode.py @ 225:c5589f21d4a3

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piNode sends hostname for page title Ignore-this: d317f012a73a98d287ba7834a1aafeb6
author drewp@bigasterisk.com
date Mon, 25 Jan 2016 00:24:34 -0800
parents 666e0e756ce6
children 1e8ef0daf0f8
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1 from __future__ import division
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2 import sys, logging, socket, json, time
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3 import cyclone.web
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4 from rdflib import Namespace, URIRef, Literal, Graph, RDF
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5 from rdflib.parser import StringInputSource
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6 from twisted.internet import reactor, task
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7 from docopt import docopt
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8 logging.basicConfig(level=logging.DEBUG)
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9 sys.path.append("/my/site/magma")
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10 sys.path.append("../../../../site/magma")
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11
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12 from stategraph import StateGraph
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13 sys.path.append('/opt/pigpio')
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14 try:
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15 import pigpio
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16 except ImportError:
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17 class pigpio(object):
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18 @staticmethod
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19 def pi():
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20 return None
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21
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22 import devices
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23
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24 # from /my/proj/room
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25 from carbondata import CarbonClient
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26
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27 log = logging.getLogger()
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28 logging.getLogger('serial').setLevel(logging.WARN)
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29 ROOM = Namespace('http://projects.bigasterisk.com/room/')
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30 HOST = Namespace('http://bigasterisk.com/ruler/host/')
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31
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32 hostname = socket.gethostname()
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33
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34 class Config(object):
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35 def __init__(self):
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36 self.graph = Graph()
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37 log.info('read config')
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38 self.graph.parse('config.n3', format='n3')
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39 self.graph.bind('', ROOM) # maybe working
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40 self.graph.bind('rdf', RDF)
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41
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42 class GraphPage(cyclone.web.RequestHandler):
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43 def get(self):
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44 g = StateGraph(ctx=ROOM['pi/%s' % hostname])
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45
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46 for stmt in self.settings.board.currentGraph():
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47 g.add(stmt)
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48
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49 if self.get_argument('config', 'no') == 'yes':
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50 for stmt in self.settings.config.graph:
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51 g.add(stmt)
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52
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53 self.set_header('Content-type', 'application/x-trig')
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54 self.write(g.asTrig())
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55
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56 class Board(object):
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57 """similar to arduinoNode.Board but without the communications stuff"""
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58 def __init__(self, graph, uri, onChange):
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59 self.graph, self.uri = graph, uri
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60 self.pi = pigpio.pi()
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61 self._devs = devices.makeDevices(graph, self.uri, self.pi)
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62 log.debug('found %s devices', len(self._devs))
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63 self._statementsFromInputs = {} # input device uri: latest statements
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64 self._carbon = CarbonClient(serverHost='bang')
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65
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66 def startPolling(self):
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67 task.LoopingCall(self._poll).start(.5)
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68
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69 def _poll(self):
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70 for i in self._devs:
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71 self._statementsFromInputs[i.uri] = i.poll()
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72 self._exportToGraphite()
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73
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74 def outputStatements(self, stmts):
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75 unused = set(stmts)
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76 for dev in self._devs:
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77 stmtsForDev = []
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78 for pat in dev.outputPatterns():
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79 if [term is None for term in pat] != [False, False, True]:
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80 raise NotImplementedError
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81 for stmt in stmts:
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82 if stmt[:2] == pat[:2]:
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83 stmtsForDev.append(stmt)
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84 unused.discard(stmt)
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85 if stmtsForDev:
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86 log.info("output goes to action handler for %s" % dev.uri)
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87 dev.sendOutput(stmtsForDev)
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88 log.info("success")
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89 if unused:
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90 log.warn("No devices cared about these statements:")
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91 for s in unused:
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92 log.warn(repr(s))
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93
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94 # needs merge with arduinoNode.py
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95 def _exportToGraphite(self):
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96 # note this is writing way too often- graphite is storing at a lower res
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97 now = time.time()
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98 # 20 sec is not precise; just trying to reduce wifi traffic
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99 if getattr(self, 'lastGraphiteExport', 0) + 20 > now:
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100 return
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101 self.lastGraphiteExport = now
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102 log.debug('graphite export:')
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103 # objects of these statements are suitable as graphite values.
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104 graphitePredicates = {ROOM['temperatureF']}
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105 # bug: one sensor can have temp and humid- this will be ambiguous
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106 for s, graphiteName in self.graph.subject_objects(ROOM['graphiteName']):
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107 for group in self._statementsFromInputs.values():
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108 for stmt in group:
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109 if stmt[0] == s and stmt[1] in graphitePredicates:
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110 log.debug(' sending %s -> %s', stmt[0], graphiteName)
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111 self._carbon.send(graphiteName, stmt[2].toPython(), now)
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112
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113 def currentGraph(self):
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114 g = Graph()
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115
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116 g.add((HOST[socket.gethostname()], ROOM['connectedTo'], self.uri))
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117
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118 for si in self._statementsFromInputs.values():
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119 for s in si:
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120 g.add(s)
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121 return g
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122
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123 def description(self):
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124 """for web page"""
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125 return {
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126 'uri': self.uri,
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127 'devices': [d.description() for d in self._devs],
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128 'graph': 'http://sticker:9059/graph', #todo
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129 }
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130
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131 def rdfGraphBody(body, headers):
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132 g = Graph()
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133 g.parse(StringInputSource(body), format='nt')
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134 return g
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135
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136 class OutputPage(cyclone.web.RequestHandler):
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137 def put(self):
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138 arg = self.request.arguments
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139 if arg.get('s') and arg.get('p'):
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140 subj = URIRef(arg['s'][-1])
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141 pred = URIRef(arg['p'][-1])
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142 turtleLiteral = self.request.body
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143 try:
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144 obj = Literal(float(turtleLiteral))
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145 except ValueError:
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146 obj = Literal(turtleLiteral)
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147 stmt = (subj, pred, obj)
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148 else:
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149 g = rdfGraphBody(self.request.body, self.request.headers)
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150 assert len(g) == 1, len(g)
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151 stmt = g.triples((None, None, None)).next()
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152
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153 self.settings.board.outputStatements([stmt])
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154
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155 class Boards(cyclone.web.RequestHandler):
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156 def get(self):
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157 self.set_header('Content-type', 'application/json')
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158 self.write(json.dumps({
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159 'host': socket.gethostname(),
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160 'boards': [self.settings.board.description()]
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161 }, indent=2))
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162
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163 def main():
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164 arg = docopt("""
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165 Usage: piNode.py [options]
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166
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167 -v Verbose
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168 """)
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169 log.setLevel(logging.WARN)
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170 if arg['-v']:
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171 from twisted.python import log as twlog
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172 twlog.startLogging(sys.stdout)
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173
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174 log.setLevel(logging.DEBUG)
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175
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176 config = Config()
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177
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178 def onChange():
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179 # notify reasoning
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180 pass
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181
221
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182 thisHost = Literal(socket.gethostname())
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183 for row in config.graph.query(
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184 'SELECT ?board WHERE { ?board a :PiBoard; :hostname ?h }',
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185 initBindings=dict(h=thisHost)):
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186 thisBoard = row.board
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187 break
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188 else:
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189 raise ValueError("config had no board for :hostname %r" % thisHost)
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190
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191 log.info("found config for board %r" % thisBoard)
182
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192 board = Board(config.graph, thisBoard, onChange)
183
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193 board.startPolling()
182
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194
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195 reactor.listenTCP(9059, cyclone.web.Application([
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196 (r"/()", cyclone.web.StaticFileHandler, {
183
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197 "path": "../arduinoNode/static", "default_filename": "index.html"}),
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198 (r'/static/(.*)', cyclone.web.StaticFileHandler, {"path": "../arduinoNode/static"}),
182
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199 (r"/graph", GraphPage),
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200 (r'/output', OutputPage),
183
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201 (r'/boards', Boards),
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202 #(r'/dot', Dot),
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203 ], config=config, board=board, debug=arg['-v']), interface='::')
182
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204 reactor.run()
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205
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206 main()