Open file dialog
Create an open file dialog after page content is loaded.
import webview
import threading
def open_file_dialog():
    file_types = ('Image Files (*.bmp;*.jpg;*.gif)', 'All files (*.*)')
    print(webview.create_file_dialog(webview.OPEN_DIALOG,
                                     allow_multiple=True,
                                     file_types=file_types))
if __name__ == '__main__':
    t = threading.Thread(target=open_file_dialog)
    t.start()
    webview.create_window("Open file dialog example", "https://pywebview.flowrl.com/hello")