sys.stdin.readline() returns an empty string!import syswhile True: try: userInput = sys.stdin.readline().strip() print(userInput) except: break EOFError(End of File) means the end of the file, or the end of input. The input() function raises an EOFError at the end of the file, but sys.stdin.readline() returns an empty str, so it does not raise an EOFError. This can lea..