title: getSaveFileName , getOpenFileName shows me the file to save or open, but cannot save the file or open the file in python QT
body: <pre><code>1.fileName = QtGui.QFileDialog.getOpenFileName(self, "Open File",
                          "F:/python/bc_new_latest/bcForecasting.csv",
                          "Excel (*.csv *.xls )");
  
  2.fileName = QtGui.QFileDialog.getSaveFileName(self, "Save",
                          "F:/python/bc_new_latest/bcForecasting.csv",
                          "Excel (*.csv *.xls )");
  </code></pre>
  
  <p>The above 2 codes shows me file dialog's to open me the file in specified location or save the file. But can not open the file or save the file in different location. What code I have to add here. Thanks in advance </p>