Python System 17 codes

1 Add comment to Python source file

2 Append to system path

3 Call os exit to terminate a program

4 Call system command

5 Construct lists from other lists

6 Do something simlar by forking process instead of threads

7 Error Output Redirection and Program Termination

8 Find all mount points in the file system

9 Get pid, command line arguments from system

10 List system variable keys and set a system parameter key

11 Operating System Interface, system time

12 Output system parameter

13 Output USER in your system

14 Set Env

15 Show my cwd execution dir and first 6 import paths

16 System os path

17 Use lambda function to find all mount points in our file system