[PyQt] UTF-8 files handling in PyQT4

[Detlev Offenbach]

Hi,

you should use the unicode() function instead of str().

Detlev

On Samstag, 5. Mai 2007, piotr maliński wrote:
> Hi, I'm writing a simple text editor in PyQT4. It works for ASCII
> characters but I use UTF-8 encoded files with non-ASCI characters like
> Polish letters (łóżźć etc.) I've used the "simple" way:
>
> ###########################
> import sys
> from PyQt4 import QtCore, QtGui
> from edytor import Ui_notatnik
>
> class StartQT4(QtGui.QMainWindow):
> 	def __init__(self, parent=None):
> 		QtGui.QWidget.__init__(self, parent)
> 		self.ui = Ui_notatnik()
> 		self.ui.setupUi(self)
> 		QtCore.QObject.connect(self.ui.button_open,QtCore.SIGNAL("clicked()"),
> self.file_dialog)
> 		QtCore.QObject.connect(self.ui.button_save,QtCore.SIGNAL("clicked()"),
> self.file_save)
> 	def file_dialog(self):
> 		fd = QtGui.QFileDialog(self)
> 		self.filename = fd.getOpenFileName()
> 		from os.path import isfile
> 		if isfile(self.filename):
> 			text = open(self.filename).read()
> 			self.ui.editor_window.setText(text)
> 	def file_save(self):
> 		from os.path import isfile
> 		if isfile(self.filename):
> 			file = open(self.filename, 'w')
> 			file.write(self.ui.editor_window.toPlainText())
> 			file.close()
>
> if __name__ == "__main__":
> 	app = QtGui.QApplication(sys.argv)
> 	myapp = StartQT4()
> 	myapp.show()
> 	sys.exit(app.exec_())
> ##############################
> It works ok for ASCI characters but when I open a file with Polish
> letters they aren't displayed properly (textEdit) - also saving a file
> with such letters won't save them correctly.
>
> Similar with QFile:
> ##############################
> # -*- coding: utf-8 -*-
> import sys
> from PyQt4 import QtCore, QtGui
> from edytor import Ui_notatnik
>
> class StartQT4(QtGui.QMainWindow):
> 	def __init__(self, parent=None):
> 		QtGui.QWidget.__init__(self, parent)
> 		self.ui = Ui_notatnik()
> 		self.ui.setupUi(self)
> 		QtCore.QObject.connect(self.ui.button_open,QtCore.SIGNAL("clicked()"),
> self.file_dialog)
> 		QtCore.QObject.connect(self.ui.button_save,QtCore.SIGNAL("clicked()"),
> self.file_save)
> 	def file_dialog(self):
> 		fd = QtGui.QFileDialog(self)
> 		self.filename = fd.getOpenFileName()
> 		from os.path import isfile
> 		if isfile(self.filename):
> 			s = QtCore.QFile(str(self.filename))
> 			s.open(QtCore.QIODevice.ReadOnly)
> 			self.ui.editor_window.setPlainText(str(s.readAll()))
> 			s.close()
> 	def file_save(self):
> 		from os.path import isfile
> 		if isfile(self.filename):
> 			s = QtCore.QFile(str(self.filename))
> 			s.open(QtCore.QIODevice.WriteOnly)
> 			s.writeData(str(self.ui.editor_window.toPlainText()))
> 			s.close()
>
> if __name__ == "__main__":
> 	app = QtGui.QApplication(sys.argv)
> 	myapp = StartQT4()
> 	myapp.show()
> 	sys.exit(app.exec_())
> #######################################
> but when I try to save the file with Polish letters I get:
>
> UnicodeEncodeError: 'ascii' codec can't encode characters in position
> 20-23: ordinal not in range(128)
>
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-- 
Detlev Offenbach
detlev at die-offenbachs.de