How to create a folder view in pyqt inside the main window

Question

I am trying to implement a folder viewer to view the structure of a specific path. and this folder view should look like a tree widget in PyQT, I know that the file dialog can help, but I need it inside the main window.
I tried to implement this with QTreeWidget, and I used a recursed function to loop around inside folders, but it's too slow. since it needs recursion around a huge number of folders. is this the right way to do this? or is there a turnkey qt solution for this problem.
Check out the picture below.

Answer 1

.

"""An example of how to use models and views in PyQt4.
Model/view documentation can be found at
http://doc.qt.nokia.com/latest/model-view-programming.html.
"""
import sys

from PyQt4.QtGui import (QApplication, QColumnView, QFileSystemModel,
                         QSplitter, QTreeView)
from PyQt4.QtCore import QDir, Qt

if __name__ == '__main__':
    app = QApplication(sys.argv)
    # Splitter to show 2 views in same widget easily.
    splitter = QSplitter()
    # The model.
    model = QFileSystemModel()
    # You can setRootPath to any path.
    model.setRootPath(QDir.rootPath())
    # List of views.
    views = []
    for ViewType in (QColumnView, QTreeView):
        # Create the view in the splitter.
        view = ViewType(splitter)
        # Set the model of the view.
        view.setModel(model)
        # Set the root index of the view as the user home directory.
        view.setRootIndex(model.index(QDir.homePath()))
    # Show the splitter.
    splitter.show()
    # Maximize the splitter.
    splitter.setWindowState(Qt.WindowMaximized)
    # Start the main loop.
    sys.exit(app.exec_())

Answer 2

PyQt5 :

def load_project_structure(startpath, tree):
    """
    Load Project structure tree
    :param startpath: 
    :param tree: 
    :return: 
    """
    import os
    from PyQt5.QtWidgets import QTreeWidgetItem
    from PyQt5.QtGui import QIcon
    for element in os.listdir(startpath):
        path_info = startpath + "/" + element
        parent_itm = QTreeWidgetItem(tree, [os.path.basename(element)])
        if os.path.isdir(path_info):
            load_project_structure(path_info, parent_itm)
            parent_itm.setIcon(0, QIcon('assets/folder.ico'))
        else:
            parent_itm.setIcon(0, QIcon('assets/file.ico'))

:

 load_project_structure("/your/path/here",projectTreeWidget)

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