Failed to launch rospy file: SyntaxError: invalid syntax YAMLObject(metaclass=YAMLObjectMetaclass):

Question

So here is the full error:

$ rosrun turtlesim_cleaner1 rotate.py 

Traceback (most recent call last):
  File "/home/kwinklink/catkin_ws/src/turtlesim_cleaner1/src/turtlesim_cleaner1/rotate.py", line 2, in <module>
    import rospy
  File "/opt/ros/noetic/lib/python3/dist-packages/rospy/__init__.py", line 47, in <module>
    from std_msgs.msg import Header
  File "/opt/ros/noetic/lib/python3/dist-packages/std_msgs/msg/__init__.py", line 1, in <module>
    from ._Bool import *
  File "/opt/ros/noetic/lib/python3/dist-packages/std_msgs/msg/_Bool.py", line 5, in <module>
    import genpy
  File "/opt/ros/noetic/lib/python3/dist-packages/genpy/__init__.py", line 34, in <module>
    from . message import Message, SerializationError, DeserializationError, MessageException, struct_I
  File "/opt/ros/noetic/lib/python3/dist-packages/genpy/message.py", line 47, in <module>
    import yaml
  File "/usr/lib/python3/dist-packages/yaml/__init__.py", line 399
    class YAMLObject(metaclass=YAMLObjectMetaclass):
                              ^
SyntaxError: invalid syntax

Here i have a picture of the error: enter image description here

I will appreciate any answers please help i have been workon on this error for a werry long time. In my rotate.py i onli have#!/usr/bin/env python import rospy

Answer 1

I found the solution!

Turns out all I had to do was to change #!/usr/bin/env python import rospy To: #!/usr/bin/env python3 import rospy