ros:dashing(1) eloquent(2) melodic(3) ?
2
yy@yy:~$ 日哦所
日哦所：未找到命令
yy@yy:~$ ros2 run learning_node node_object
[INFO] [node_object]: ROS2节点示例：检测图片中的苹果
Traceback (most recent call last):
  File "/home/yy/dev_ws/install/learning_node/lib/learning_node/node_object", line 11, in <module>
    load_entry_point('learning-node==0.0.0', 'console_scripts', 'node_object')()
  File "/home/yy/dev_ws/install/learning_node/lib/python3.6/site-packages/learning_node/node_object.py", line 42, in main
    object_detect(image)                                                            # 苹果检测
  File "/home/yy/dev_ws/install/learning_node/lib/python3.6/site-packages/learning_node/node_object.py", line 22, in object_detect
    contours, hierarchy = cv2.findContours(mask_red, cv2.RETR_LIST, cv2.CHAIN_APPROX_NONE) # 图像中轮廓检测
ValueError: too many values to unpack (expected 2)、

用个ubuntu18.04 然后只能用eloquent版本 是不是版本问题