ROS - error when running .py file in project

Problem Description

When running the program in the ROS package, it prompts that the file is not an executable file.

rosrun beginner_tutorials control.py

The error message is as follows:

[rosrun] Couldn't find executable named controller.py below ...
[rosrun] Found the following, but they're either not files,
[rosrun] or not executable:
[rosrun] .../scripts/controller.py

In addition, after source, entering rosrun beginner_tutorials and pressing the tab key will not automatically prompt the .py file.

Solution

This problem occurs mainly because the .py file has insufficient permissions. The solution is as follows:

1. Open the command window, where the .py file is located, enter in the command window

   chmod a+x xx.py
   

   where xx is the name of your .py file.

2. Just run it again.