text: #!/usr/bin/env python
  # -*- coding: Latin-1 -*-
  """
  @file    TaxisPerEdge.py
  @author  Sascha Krieg
  @author  Daniel Krajzewicz
  @author  Michael Behrisch
  @date    2008-04-08
  @version $Id$
  
  Counts for every edge in the given FCD-file the number of Taxis which used this edge.
  After that this information can be visualized with an script called mpl_dump_onNet from Daniel.
  
  
  SUMO, Simulation of Urban MObility; see http://sumo.dlr.de/
  Copyright (C) 2008-2017 DLR (http://www.dlr.de/) and contributors
  
  This file is part of SUMO.
  SUMO is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 3 of the License, or
  (at your option) any later version.
  """
  from __future__ import absolute_import
  from __future__ import print_function
  
  import util.Path as path
  
  # global vars
  edgeList = {}
  
  
  def main():
      print("start program")
      countTaxisForEachEdge()
      writeOutput()
      print("end")
  
  
  def countTaxisForEachEdge():
      """counts the frequency of each edge"""
      inputFile = open(path.vls, 'r')
      for line in inputFile:
          words = line.split("\t")
          edgeList.setdefault(words[1], set())
          edgeList[words[1]].add(words[4])
  
      for k in edgeList:
          print(k)
          print(len(edgeList[k]))
      print(len(edgeList))
  
  
  def writeOutput():
      """Writes an XML-File with the extracted results"""
      outputFile = open(path.taxisPerEdge, 'w')
      outputFile.write("<netstats>\n")
      outputFile.write("\t<interval begin=\"0\" end=\"899\" id=\"dump_900\">\n")
      for k in edgeList:
          outputFile.write(
              "\t\t<edge id=\"%s\" no=\"%s\" color=\"1.0\"/>\n" % (k, len(edgeList[k])))
      outputFile.write("\t</interval>\n")
      outputFile.write("</netstats>")
  
  
  # start the program
  main()
  