Never use input() in Python 2
import os import sys data = input() print "done"
Run the script.
Type in os.system("ls -l")
Can you feel the danger in that?
What if someone typed in os.remove(__file__)
That would remove the current python file.
What if instead of the ls -l in os.system("ls -l") someone typed in rm -rf /.
All your files would be gone before you know it.
The problem is that input(prompt) in Python 2 is the same as eval(raw_input(prompt)) which means that after reading in the content of the standard input, python will immediately try to evaluate it.
That's never a good idea. I don't know how Guido thought it would be a good idea to have this feature in the language.
raw_input(prompt) and never input(prompt)