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copied!<p>I assume that with "output from the interpreter", you mean output written to the console or terminal window, such as output produced with <code>print()</code>.</p> <p>All console output produced by Python gets written to the program's output streams <code>sys.stdout</code> (normal output) and <code>sys.stderr</code> (error output, such as exception tracebacks). These are file-like objects.</p> <p>You can replace these streams with your own file-like object. All your custom implementation must provide is a <code>write(text)</code> function. By providing your own implementation, you can forward all output to your widget:</p> <pre><code>class MyStream(object): def write(self, text): # Add text to a QTextEdit... sys.stdout = MyStream() sys.stderr = MyStream() </code></pre> <p>If you ever need to reset these streams, they are still available as <code>sys.__stdout__</code> and <code>sys.__stderr__</code>:</p> <pre><code>sys.stdout = sys.__stdout__ sys.stderr = sys.__stderr__ </code></pre> <hr> <p><strong>Update</strong></p> <p>Here is some working code for PyQt4. First define a stream that reports data written to it with a Qt signal:</p> <pre><code>from PyQt4 import QtCore class EmittingStream(QtCore.QObject): textWritten = QtCore.pyqtSignal(str) def write(self, text): self.textWritten.emit(str(text)) </code></pre> <p>Now, in your GUI, install an instance of this stream to <code>sys.stdout</code> and connect the <code>textWritten</code> signal to a slot that writes the text to a <code>QTextEdit</code>:</p> <pre><code># Within your main window class... def __init__(self, parent=None, **kwargs): # ... # Install the custom output stream sys.stdout = EmittingStream(textWritten=self.normalOutputWritten) def __del__(self): # Restore sys.stdout sys.stdout = sys.__stdout__ def normalOutputWritten(self, text): """Append text to the QTextEdit.""" # Maybe QTextEdit.append() works as well, but this is how I do it: cursor = self.textEdit.textCursor() cursor.movePosition(QtGui.QTextCursor.End) cursor.insertText(text) self.textEdit.setTextCursor(cursor) self.textEdit.ensureCursorVisible() </code></pre>

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