title: PyQt5 get char format from QTextEdit
body: <p>I have written a small text editor using PyQt5. Suppose I have typed Hello World in the editor, and upon clicking the print button, I need to know for each character in &quot;Hello World&quot; the followings:</p>
  <ol>
  <li><p>The actual character value (e.g. H when iterator is 1, e when iterator is 2...etc)</p>
  </li>
  <li><p>If the character is bold or not</p>
  </li>
  <li><p>If the character is italic or not</p>
  </li>
  <li><p>The font size of the character</p>
  </li>
  </ol>
  <p>From the documentation <a href="https://doc.qt.io/qtforpython/PySide2/QtGui/QTextBlock.html" rel="nofollow noreferrer">https://doc.qt.io/qtforpython/PySide2/QtGui/QTextBlock.html</a> , it seems that it is possible to iterate over a text block. I am unsure how to do it and also how to extract the above information.</p>
  <pre><code>from PyQt5 import QtCore, QtGui, QtWidgets
  
  class freeTextPrint(QtWidgets.QMainWindow):
      def __init__(self):
          QtWidgets.QMainWindow.__init__(self)
          self.setupUI()
      
      def setupUI(self):
  
          #Render the font size label
          self.toolbar = self.addToolBar('format')
          labelFontSize = QtWidgets.QLabel('Font Size')
          font = QtGui.QFont()
          font.setPointSize(11)
          font.setBold(True)
          labelFontSize.setFont(font)
          self.toolbar.addWidget(labelFontSize)
          self.toolbar.addSeparator()
  
          #Font Size combo box
          self.fontSizeComboBox = QtWidgets.QComboBox(self)
          #Insert font sizes to the combo box
          sizeList = list(range(10, 31))
          for i in sizeList:
              self.fontSizeComboBox.addItem(str(i))
          self.fontSizeComboBox.currentIndexChanged.connect(self.fontSizeChanged)
          
          font.setBold(False)
          self.fontSizeComboBox.setFont(font)
          self.toolbar.addWidget(self.fontSizeComboBox)
  
          #A toogle button to set bold font to True or False
          self.toolbar.addSeparator()
          self.boldAction = QtWidgets.QAction(QtGui.QIcon('icons/format-text-bold.svg'), 'bold', self)
          self.boldAction.triggered.connect(self.bold)
          self.toolbar.addAction(self.boldAction)
  
          #A toogle button to set italic to true or false
          self.italicAction = QtWidgets.QAction(QtGui.QIcon('icons/format-text-italic.svg'),'italic', self)
          self.italicAction.triggered.connect(self.italic)
          self.toolbar.addAction(self.italicAction)
  
          #Setup textedit
          self.textEdit = QtWidgets.QTextEdit(self)
          self.textEdit.setGeometry(QtCore.QRect(20, 40, 521, 121))
          #Limit characters
          self.textEdit.LineWrapMode(QtWidgets.QTextEdit.FixedColumnWidth)
  
          #Add print push button
          self.printPushButton = QtWidgets.QPushButton(self)
          self.printPushButton.setGeometry(QtCore.QRect(418, 180, 120, 30))
          self.printPushButton.setText('Print')
          self.printPushButton.clicked.connect(self.print)
          font.setBold(True)
          self.printPushButton.setFont(font)
  
          #Label for Printer connection
          labelPrinterConnection = QtWidgets.QLabel('Printer Connection', self)
          labelPrinterConnection.setGeometry(QtCore.QRect(20, 180, 160, 30))
          labelPrinterConnection.setFont(font)
          
          #Geometry of the main window
          self.setGeometry(100, 100, 600, 300)
      
      def fontSizeChanged(self):
          #Get the value of the updated font size
          selectedFontSize = int(self.fontSizeComboBox.currentText())
          hasSelection, cursor = self.textSelected()
          fmt = QtGui.QTextCharFormat()
          if hasSelection:
              fmt.setFontPointSize(selectedFontSize)
              cursor.mergeCharFormat(fmt)
          else:
              self.textEdit.setFontPointSize(selectedFontSize)
          
      def bold(self):
          #check anything has selected. If found only the selected part is formatted
          hasSelection, cursor = self.textSelected()
  
          if hasSelection:
              #Get the current weight of the selected text
              selection = cursor.selection()
              htmlString = selection.toHtml()
              #Check if the the htmlString already has code for bold character. If found, the bold setting is turned off, otherwise it is turned on
              fmt = QtGui.QTextCharFormat()
              if 'font-weight:600' in htmlString:
                  fmt.setFontWeight(QtGui.QFont.Normal)
                  cursor.mergeCharFormat(fmt)
              else:
                  fmt.setFontWeight(QtGui.QFont.Bold)
                  cursor.mergeCharFormat(fmt)
      
      def textSelected(self):
          '''
          get the cursor object from text editor and checks if text is selected. If text is selected return True together with the cursor object, otherwise 
          return False with the cursor object
          '''
          cursor = self.textEdit.textCursor()
          if cursor.hasSelection():
              return True, cursor
          else:
              return False, cursor
  
      def italic(self):
          hasSelection, cursor = self.textSelected()
          if hasSelection:
              selection = cursor.selection()
              htmlString = selection.toHtml()
              #Check if the selection is already italic if so, italic will be turned off. Otherwise, italic will be turned on
              fmt = QtGui.QTextCharFormat()
              
              if 'font-style:italic' in htmlString:
                  fmt.setFontItalic(False)
              else:
                  fmt.setFontItalic(True)
              cursor.mergeCharFormat(fmt)
              
      def print(self):
          document = self.textEdit.document()
          currentBlock = document.firstBlock()
          blockCharFormat = currentBlock.charFormat()
          print(blockCharFormat)
          
          pass
  
  if __name__ == &quot;__main__&quot;:
      import sys
      app = QtWidgets.QApplication(sys.argv)
      ui = freeTextPrint()
      ui.show()
      sys.exit(app.exec_())
  </code></pre>