Helpviewer/OpenSearch/OpenSearchEngineModel.py

Sun, 19 Jun 2011 19:36:27 +0200

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Sun, 19 Jun 2011 19:36:27 +0200
changeset 1131
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parent 1112
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child 1509
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permissions
-rw-r--r--

Changed the code to use super() to access the superclass.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2009 - 2011 Detlev Offenbach <detlev@die-offenbachs.de>
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4 #
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5
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6 """
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7 Module implementing a model for search engines.
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8 """
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9
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10 import re
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11
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12 from PyQt4.QtCore import Qt, QUrl, QAbstractTableModel, QModelIndex
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13 from PyQt4.QtGui import QPixmap, QIcon
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14
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15
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16 class OpenSearchEngineModel(QAbstractTableModel):
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17 """
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18 Class implementing a model for search engines.
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19 """
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20 def __init__(self, manager, parent=None):
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21 """
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22 Constructor
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23
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24 @param manager reference to the search engine manager (OpenSearchManager)
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25 @param parent reference to the parent object (QObject)
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26 """
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27 super().__init__(parent)
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28
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29 self.__manager = manager
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30 manager.changed.connect(self.__enginesChanged)
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31
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32 self.__headers = [
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33 self.trUtf8("Name"),
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34 self.trUtf8("Keywords"),
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35 ]
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36
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37 def removeRows(self, row, count, parent=QModelIndex()):
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38 """
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39 Public method to remove entries from the model.
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40
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41 @param row start row (integer)
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42 @param count number of rows to remove (integer)
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43 @param parent parent index (QModelIndex)
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44 @return flag indicating success (boolean)
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45 """
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46 if parent.isValid():
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47 return False
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48
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49 if count <= 0:
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50 return False
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51
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52 if self.rowCount() <= 1:
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53 return False
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54
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55 lastRow = row + count - 1
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56
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57 self.beginRemoveRows(parent, row, lastRow)
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58
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59 nameList = self.__manager.allEnginesNames()
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60 for index in range(row, lastRow + 1):
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61 self.__manager.removeEngine(nameList[index])
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62
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63 # removeEngine emits changed()
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64 #self.endRemoveRows()
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65
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66 return True
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67
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68 def rowCount(self, parent=QModelIndex()):
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69 """
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70 Public method to get the number of rows of the model.
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71
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72 @param parent parent index (QModelIndex)
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73 @return number of rows (integer)
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74 """
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75 if parent.isValid():
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76 return 0
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77 else:
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78 return self.__manager.enginesCount()
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79
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80 def columnCount(self, parent=QModelIndex()):
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81 """
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82 Public method to get the number of columns of the model.
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83
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84 @param parent parent index (QModelIndex)
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85 @return number of columns (integer)
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86 """
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87 return 2
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88
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89 def flags(self, index):
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90 """
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91 Public method to get flags for a model cell.
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92
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93 @param index index of the model cell (QModelIndex)
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94 @return flags (Qt.ItemFlags)
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95 """
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96 if index.column() == 1:
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97 return Qt.ItemIsEnabled | Qt.ItemIsSelectable | Qt.ItemIsEditable
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98 else:
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99 return Qt.ItemIsEnabled | Qt.ItemIsSelectable
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100
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101 def data(self, index, role):
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102 """
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103 Public method to get data from the model.
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104
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105 @param index index to get data for (QModelIndex)
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106 @param role role of the data to retrieve (integer)
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107 @return requested data
0
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108 """
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109 if index.row() >= self.__manager.enginesCount() or index.row() < 0:
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110 return None
0
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111
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112 engine = self.__manager.engine(self.__manager.allEnginesNames()[index.row()])
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113
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114 if engine is None:
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115 return None
0
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116
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117 if index.column() == 0:
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118 if role == Qt.DisplayRole:
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119 return engine.name()
0
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120
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121 elif role == Qt.DecorationRole:
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122 image = engine.image()
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123 if image.isNull():
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124 from Helpviewer.HelpWindow import HelpWindow
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125 icon = HelpWindow.icon(QUrl(engine.imageUrl()))
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126 else:
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127 icon = QIcon(QPixmap.fromImage(image))
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128 return icon
0
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129
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130 elif role == Qt.ToolTipRole:
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131 description = self.trUtf8("<strong>Description:</strong> {0}")\
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132 .format(engine.description())
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133 if engine.providesSuggestions():
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134 description += "<br/>"
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135 description += \
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136 self.trUtf8("<strong>Provides contextual suggestions</strong>")
0
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137
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138 return description
0
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139 elif index.column() == 1:
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140 if role in [Qt.EditRole, Qt.DisplayRole]:
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141 return ",".join(self.__manager.keywordsForEngine(engine))
0
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142 elif role == Qt.ToolTipRole:
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143 return self.trUtf8("Comma-separated list of keywords that may"
0
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144 " be entered in the location bar followed by search terms to search"
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145 " with this engine")
0
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146
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147 return None
0
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148
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149 def setData(self, index, value, role=Qt.EditRole):
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150 """
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151 Public method to set the data of a model cell.
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152
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153 @param index index of the model cell (QModelIndex)
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154 @param value value to be set
0
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155 @param role role of the data (integer)
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156 @return flag indicating success (boolean)
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157 """
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158 if not index.isValid() or index.column() != 1:
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159 return False
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160
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161 if index.row() >= self.rowCount() or index.row() < 0:
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162 return False
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163
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164 if role != Qt.EditRole:
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165 return False
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166
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167 engineName = self.__manager.allEnginesNames()[index.row()]
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168 keywords = re.split("[ ,]+", value)
0
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169 self.__manager.setKeywordsForEngine(self.__manager.engine(engineName), keywords)
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170
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171 return True
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172
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173 def headerData(self, section, orientation, role=Qt.DisplayRole):
0
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174 """
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175 Public method to get the header data.
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176
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177 @param section section number (integer)
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178 @param orientation header orientation (Qt.Orientation)
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179 @param role data role (integer)
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180 @return header data
0
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181 """
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182 if orientation == Qt.Horizontal and role == Qt.DisplayRole:
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183 try:
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184 return self.__headers[section]
0
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185 except IndexError:
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186 pass
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187
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188 return None
0
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189
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190 def __enginesChanged(self):
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191 """
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192 Private slot handling a change of the registered engines.
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193 """
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194 super().reset()

eric ide

mercurial