more_temp.py

from PySide2 import QtWidgets, QtGui, QtCore
import sys


_FILEPATH = '/Users/benhearn/Music/tracks'

class File_System_Model(QtWidgets.QFileSystemModel):
    def __init__(self, root):
        QtWidgets.QFileSystemModel.__init__(self)
        self.setRootPath(root)

        filters = ['*.wav', '*.mp3']
        self.setNameFilters(filters)
        self.setNameFilterDisables(False)



class Tree_File_System(QtWidgets.QTreeView):
    def __init__(self, root):
        QtWidgets.QTreeView.__init__(self)
        model = File_System_Model(root)

        self.setModel(model)
        self.setRootIndex(model.index(model.rootPath()))
        self.hideColumn(1)
        self.hideColumn(2)
        self.hideColumn(3)
        self.setHeaderHidden(True)



class Test(QtWidgets.QDialog):
    def __init__(self):
        QtWidgets.QDialog.__init__(self)
        self.setMinimumHeight(500)

        master_lyt = QtWidgets.QVBoxLayout()
        master_lyt.setContentsMargins(0, 0, 0, 0)
        master_lyt.setAlignment(QtCore.Qt.AlignTop)

        file_tree = Tree_File_System(_FILEPATH)
        tree_widg = QtWidgets.QTreeWidget()
        tree_widg.setHeaderHidden(True)

        root_item = QtWidgets.QTreeWidgetItem()
        root_item.setText(0, _FILEPATH)
        tree_widg.addTopLevelItem(root_item)

        child = QtWidgets.QTreeWidgetItem()
        child.setText(0, 'TEMP')
        root_item.addChild(child)
        tree_widg.setItemWidget(child, 0, file_tree)

        master_lyt.addWidget(tree_widg)
        self.setLayout(master_lyt)
        self.show()



def main():
    app = QtWidgets.QApplication(sys.argv)
    app.setApplicationName("test")

    font = QtGui.QFont('Arial')
    font.setPointSize(10)
    app.setFont(font)

    window = Test()
    window.show()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()