eric6/PipInterface/PipDialog.py

Wed, 17 Jun 2020 20:18:54 +0200

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Wed, 17 Jun 2020 20:18:54 +0200
changeset 7628
f904d0eef264
parent 7360
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child 7780
41420f82c0ac
permissions
-rw-r--r--

Checked the reported security related issue reports generated by the new security checker.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2015 - 2020 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 dialog showing the output of a pip command.
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8 """
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9
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10
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11 from PyQt5.QtCore import (
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12 pyqtSlot, Qt, QCoreApplication, QTimer, QProcess
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13 )
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14 from PyQt5.QtWidgets import QDialog, QDialogButtonBox, QAbstractButton
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15
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16 from E5Gui import E5MessageBox
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17
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18 from .Ui_PipDialog import Ui_PipDialog
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19
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20 import Preferences
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21
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22
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23 class PipDialog(QDialog, Ui_PipDialog):
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24 """
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25 Class implementing a dialog showing the output of a 'python -m pip'
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26 command.
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27 """
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28 def __init__(self, text, parent=None):
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29 """
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30 Constructor
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31
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32 @param text text to be shown by the label
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33 @type str
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34 @param parent reference to the parent widget
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35 @type QWidget
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36 """
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37 super(PipDialog, self).__init__(parent)
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38 self.setupUi(self)
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39
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40 self.proc = None
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41 self.__processQueue = []
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42 self.__ioEncoding = Preferences.getSystem("IOEncoding")
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43
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44 self.outputGroup.setTitle(text)
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45
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46 self.show()
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47 QCoreApplication.processEvents()
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48
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49 def closeEvent(self, e):
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50 """
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51 Protected slot implementing a close event handler.
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52
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53 @param e close event
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54 @type QCloseEvent
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55 """
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56 self.__processQueue = []
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57
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58 if (
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59 self.proc is not None and
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60 self.proc.state() != QProcess.NotRunning
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61 ):
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62 self.proc.terminate()
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63 QTimer.singleShot(2000, self.proc.kill)
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64 self.proc.waitForFinished(3000)
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65
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66 self.proc = None
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67
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68 e.accept()
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69
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70 def __finish(self):
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71 """
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72 Private slot called when the process finished or the user pressed
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73 the button.
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74 """
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75 if (
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76 self.proc is not None and
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77 self.proc.state() != QProcess.NotRunning
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78 ):
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79 self.proc.terminate()
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80 QTimer.singleShot(2000, self.proc.kill)
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81 self.proc.waitForFinished(3000)
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82
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83 self.proc = None
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84
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85 self.buttonBox.button(QDialogButtonBox.Close).setEnabled(True)
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86 self.buttonBox.button(QDialogButtonBox.Close).setFocus(
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87 Qt.OtherFocusReason)
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88
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89 if self.__processQueue:
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90 cmd, args = self.__processQueue.pop(0)
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91 self.__addOutput("\n\n")
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92 self.startProcess(cmd, args)
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93
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94 @pyqtSlot(QAbstractButton)
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95 def on_buttonBox_clicked(self, button):
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96 """
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97 Private slot called by a button of the button box clicked.
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98
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99 @param button button that was clicked
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100 @type QAbstractButton
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101 """
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102 if button == self.buttonBox.button(QDialogButtonBox.Close):
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103 self.close()
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104
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105 def __procFinished(self, exitCode, exitStatus):
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106 """
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107 Private slot connected to the finished signal.
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108
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109 @param exitCode exit code of the process
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110 @type int
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111 @param exitStatus exit status of the process
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112 @type QProcess.ExitStatus
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113 """
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114 self.__finish()
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115
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116 def startProcess(self, cmd, args, showArgs=True):
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117 """
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118 Public slot used to start the process.
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119
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120 @param cmd name of the pip executable to be used
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121 @type str
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122 @param args list of arguments for the process
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123 @type list of str
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124 @keyparam showArgs flag indicating to show the arguments
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125 @type bool
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126 @return flag indicating a successful start of the process
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127 @rtype bool
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128 """
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129 if len(self.errors.toPlainText()) == 0:
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130 self.errorGroup.hide()
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131
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132 if showArgs:
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133 self.resultbox.append(cmd + ' ' + ' '.join(args))
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134 self.resultbox.append('')
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135
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136 self.proc = QProcess()
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137 self.proc.finished.connect(self.__procFinished)
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138 self.proc.readyReadStandardOutput.connect(self.__readStdout)
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139 self.proc.readyReadStandardError.connect(self.__readStderr)
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140 self.proc.start(cmd, args)
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141 procStarted = self.proc.waitForStarted(5000)
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142 if not procStarted:
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143 self.buttonBox.setFocus()
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144 E5MessageBox.critical(
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145 self,
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146 self.tr('Process Generation Error'),
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147 self.tr(
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148 'The process {0} could not be started.'
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149 ).format(cmd))
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150 return procStarted
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151
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152 def startProcesses(self, processParams):
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153 """
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154 Public method to issue a list of commands to be executed.
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155
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156 @param processParams list of tuples containing the command
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157 and arguments
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158 @type list of tuples of (str, list of str)
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159 @return flag indicating a successful start of the first process
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160 @rtype bool
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161 """
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162 if len(processParams) > 1:
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163 for cmd, args in processParams[1:]:
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164 self.__processQueue.append((cmd, args[:]))
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165 cmd, args = processParams[0]
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166 return self.startProcess(cmd, args)
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167
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168 def __readStdout(self):
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169 """
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170 Private slot to handle the readyReadStandardOutput signal.
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171
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172 It reads the output of the process, formats it and inserts it into
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173 the contents pane.
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174 """
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175 if self.proc is not None:
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176 txt = str(self.proc.readAllStandardOutput(),
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177 self.__ioEncoding, 'replace')
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178 self.__addOutput(txt)
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179
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180 def __addOutput(self, txt):
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181 """
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182 Private method to add some text to the output pane.
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183
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184 @param txt text to be added
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185 @type str
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186 """
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187 self.resultbox.insertPlainText(txt)
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188 self.resultbox.ensureCursorVisible()
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189 QCoreApplication.processEvents()
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190
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191 def __readStderr(self):
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192 """
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193 Private slot to handle the readyReadStandardError signal.
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194
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195 It reads the error output of the process and inserts it into the
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196 error pane.
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197 """
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198 if self.proc is not None:
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199 s = str(self.proc.readAllStandardError(),
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200 self.__ioEncoding, 'replace')
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201 self.errorGroup.show()
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202 self.errors.insertPlainText(s)
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203 self.errors.ensureCursorVisible()
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204
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205 QCoreApplication.processEvents()

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