demo.py

from PyQt5.QtWidgets import *

from qgis.PyQt.QtGui import (
    QColor,
)

import cudf
import cuspatial

print("cudf version: ", cudf.__version__)
print("cuspatial version: ", cuspatial.__version__)

from qgis.PyQt.QtCore import Qt, QRectF

from qgis.PyQt.QtWidgets import QMenu

from qgis.core import (
    QgsVectorLayer,
    QgsPoint,
    QgsPointXY,
    QgsProject,
    QgsGeometry,
    QgsMapRendererJob,
    QgsWkbTypes,
)

from qgis.gui import (
    QgsMapCanvas,
    QgsVertexMarker,
    QgsMapCanvasItem,
    QgsMapMouseEvent,
    QgsRubberBand,
)


app = QApplication([])
# label = QLabel('Hello magic World!')

canvas = QgsMapCanvas()
canvas.setCanvasColor(Qt.white)
canvas.enableAntiAliasing(True)
canvas.show()

# label.show()
app.exec()

start_app.sh

#!/bin/bash

. /opt/conda/etc/profile.d/conda.sh
conda activate all_cuda-118_arch-x86_64

xauth add $DISPLAY . $XAUTH_TOKEN

python --version
which python
nvidia-smi
python /home/jovyan/demo.py
# python hbcbrowser.py
#cd /hbc_browser
#python hbcbrowser.py