SmallAdmin (alpha)

import signal
from os import system

signal.signal(signal.SIGINT, signal.SIG_IGN)

class CommandLine:

    def cmd_look(self, cmd):
        self.cmd = cmd

        b_command = lambda w,s: set(w).intersection(s.split())

        blocked_command = [
        "echo","crontab","cron"
        ]

        try:
            cmd = cmd

        except (KeyboardInterrupt,EOFError) as exception_error:
            system('clear')
            pass

        else:
            if ( b_command(blocked_command,cmd) ):
                print("BLOCKED")
                exit()

            elif ( cmd == "exit" ):
                exit()

            else:
                system(cmd)

    def __init__(self):
        try:
            cmd = input("do> ")

        except (KeyboardInterrupt,EOFError) as exception_error:
            system('clear')
            pass

        else:
            self.cmd_look(cmd)

while( True ):
    CommandLine()