如何重置 QFile/QTextStream？

Question

我正在获取一个文件，以便在第一次读取后重置。所有谷歌搜索都没有帮助。

如何在第一次读取文件后将其重置为开始？

试用一：

        inFile = QFile( self._pathFileName )
        inFile.open(QFile.ReadOnly | QFile.Text)
        stream = QTextStream(inFile)
        
        # Count first all lines in the file
        self._numLinesRead = 0
        self._mumLinesTotal = 0
        while not stream.atEnd():
            self._mumLinesTotal=+1
            stream.readLine();
        
        inFile.seek(0)
        stream.seek(0) 
        pos = stream.pos()   # pos is equal to 0 after this line verified with debugging
        
        while( not stream.atEnd() ):  # but here it still thinks he's at file end and jumps over
            ....

试验二：

        inFile = QFile( self._pathFileName )
        inFile.open(QFile.ReadOnly | QFile.Text)
        stream = QTextStream(inFile)
        
        # Count first all lines in the file
        self._numLinesRead = 0
        self._mumLinesTotal = 0
        while not stream.atEnd():
            self._mumLinesTotal=+1
            stream.readLine();
        inFile.close()
        
        del inFile
        del stream
        inFile = QFile( self._pathFileName )
        inFile.open(QFile.ReadOnly | QFile.Text)
        stream = QTextStream(inFile)
        # everyting has been reset?!
        
        while( not stream.atEnd() ):  # Nop it still thinks it is atEnd and jumps over
            ....

我尝试了网上找到的所有解决方案。没有任何帮助。我做错了什么？

Answer 1

不知道该说什么，但在系统完全重启后，“试用二”成功了。

第二次重启后（两天后更改了大量代码）“试用版”也出现了。

毕竟：从我的角度来看，这两个试验都是有效的。

如果您在开发和调试过程中发现奇怪的行为，请尝试重新启动。

如何重置 QFile/QTextStream？

How to reset QFile/ QTextStream?

python-3.x

pyqt5