def setup_lexer(self):
# Set Python lexer
lexer = QsciLexerPython(self)
lexer.setDefaultFont(self._font)
self.setLexer(lexer)
lexer.setDefaultPaper(QtGui.QColor("#000000"))
lexer.setPaper(QtGui.QColor("#000000"))
lexer.setAutoIndentStyle(QsciScintilla.AiOpening)
self.setstyle()
self.setIndentationsUseTabs(False)
self.setBackspaceUnindents(True)
self.setIndentationWidth(4)
