How to check if stdin is empty before clearing stdin

To check if stdin is empty before clearing it, you can use the peek() method from the sys.stdin object in Python. Here's an example:

pythonCopy code
import sys



# Check if stdin is empty

if sys.stdin.peek():

    # Clear stdin

    sys.stdin.readline()



# Rest of your code...

The peek() method returns the next character from stdin without removing it from the stream. If stdin is empty, it will return an empty string, which evaluates to False in a boolean context. So, you can use it in an if statement to check if stdin is empty.

If stdin is not empty, you can clear it by calling readline() or any other method to read and discard the input.

Keep in mind that this approach assumes that stdin is not redirected from a file or another source. If stdin is redirected, it may not be possible to determine if it is empty or not before attempting to read from it.