Question

I m trying to compare keyboard input to a string:

import sys

# read from keyboard
line = sys.stdin.readline()
if line == "stop":
    print 'stop detected'
else:
    print 'no stop detected'

When I type ‘stop’ at the keyboard and enter, I want the program to print ‘stop detected’ but it always prints ‘no stop detected’. How can I fix this?

Answer 1

sys.stdin.readline() includes the trailing newline character. Either use raw_input(), or compare line.rstrip("\n") to the string you are looking for (or even line.strip().lower()).