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PyQt QFileDialog custom proxy filter not working

This working code calls QFileDialog, prompting the user to select the CSV file:

def load(self,fileName=None):
        if not fileName:
            fileName=fileDialog.getOpenFileName(caption="Load Existing Radio Log",filter="csv (*.csv)")[0]
  ...
  ...

Now, I would like this filter to be more selective. The program saves each project as a set of three CSV files (project.csv, project_fleetsync.csv, project_clueLog.csv), but I want the first (project.csv) to be displayed in the file dialog box to avoid introducing a user with too many variants when only a third of them can be processed by the rest of the load () function.

According to this post , it seems like the solution is to use a proxy model. So, I changed the code to the following (all commented lines in load () are the things I tried in different combinations):

def load(self,fileName=None):
    if not fileName:
        fileDialog=QFileDialog()
        fileDialog.setProxyModel(CSVFileSortFilterProxyModel(self))
#           fileDialog.setNameFilter("CSV (*.csv)")
#           fileDialog.setOption(QFileDialog.DontUseNativeDialog)
#           fileName=fileDialog.getOpenFileName(caption="Load Existing Radio Log",filter="csv (*.csv)")[0]
#           fileName=fileDialog.getOpenFileName(caption="Load Existing Radio Log")[0]
#           fileDialog.exec_()

...
...

# code for CSVFileSortFilterProxyModel partially taken from
#  https://github.com/ZhuangLab/storm-control/blob/master/steve/qtRegexFileDialog.py
class CSVFileSortFilterProxyModel(QSortFilterProxyModel):
    def __init__(self,parent=None):
        print("initializing CSVFileSortFilterProxyModel")
        super(CSVFileSortFilterProxyModel,self).__init__(parent)

    # filterAcceptsRow - return True if row should be included in the model, False otherwise
    #
    # do not list files named *_fleetsync.csv or *_clueLog.csv
    #  do a case-insensitive comparison just in case
    def filterAcceptsRow(self,source_row,source_parent):
        print("CSV filterAcceptsRow called")
        source_model=self.sourceModel()
        index0=source_model.index(source_row,0,source_parent)
        # Always show directories
        if source_model.isDir(index0):
            return True
        # filter files
        filename=source_model.fileName(index0)
#       filename=self.sourceModel().index(row,0,parent).data().lower()
        print("testing lowercased filename:"+filename)
        if filename.count("_fleetsync.csv")+filename.count("_clueLog.csv")==0:
            return True
        else:
            return False

load(), " CSVFileSortFilterProxyModel" , , -, filterAcceptsRow : "CSV filterAcceptsRow", "output", _fleetsync.csv _clueLog.csv . , - ...?

0
1

.

:

, , - dialog.setOption(QFileDialog:: DontUseNativeDialog) dialog.setProxyModel.

, fileDialog.exec_(), fileDialog.getOpenFileName. , setNameFilter, , , proxymodel . , , , , , .

Frank ariwez.

:, , , :

def load(self,fileName=None):
    if not fileName:
        fileDialog=QFileDialog()
        fileDialog.setOption(QFileDialog.DontUseNativeDialog)
        fileDialog.setProxyModel(CSVFileSortFilterProxyModel(self))
        fileDialog.setNameFilter("CSV Radio Log Data Files (*.csv)")
        fileDialog.setDirectory(self.firstWorkingDir)
        if fileDialog.exec_():
            fileName=fileDialog.selectedFiles()[0]
        else: # user pressed cancel on the file browser dialog
            return
... (the rest of the load function processes the selected file)
...


# code for CSVFileSortFilterProxyModel partially taken from
#  https://github.com/ZhuangLab/storm-control/blob/master/steve/qtRegexFileDialog.py
class CSVFileSortFilterProxyModel(QSortFilterProxyModel):
    def __init__(self,parent=None):
#       print("initializing CSVFileSortFilterProxyModel")
        super(CSVFileSortFilterProxyModel,self).__init__(parent)

    # filterAcceptsRow - return True if row should be included in the model, False otherwise
    #
    # do not list files named *_fleetsync.csv or *_clueLog.csv
    #  do a case-insensitive comparison just in case
    def filterAcceptsRow(self,source_row,source_parent):
#       print("CSV filterAcceptsRow called")
        source_model=self.sourceModel()
        index0=source_model.index(source_row,0,source_parent)
        # Always show directories
        if source_model.isDir(index0):
            return True
        # filter files
        filename=source_model.fileName(index0).lower()
#       print("testing lowercased filename:"+filename)
        # never show non- .csv files
        if filename.count(".csv")<1:
            return False
        if filename.count("_fleetsync.csv")+filename.count("_cluelog.csv")==0:
            return True
        else:
            return False
+1

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