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pythonqtreadlinepyqt5qtextstream

Use QTextStream to read the first line in a string

How can I use QTextStream to read the first line in a string (read from a file before)?

streamin = QTextStream(str)
line = streamin.readLine()

It seems that this code doesn't work.

Solution

  • The QTextStream class does not accept python strings directly. For PyQt5, you must convert the string to a QByteArray first:

    >>> s = """\
... First Line
... Second Line
... Third Line
... """
>>> ba = QtCore.QByteArray(s.encode('utf-8'))
>>> ts = QtCore.QTextStream(ba)
>>> ts.setCodec('utf-8')
>>> ts.readLine()
'First Line'