please help me, this code doesn't work,
the output file comes out to be empty. How do i fix it? and where is it
going wrong?
==============rot13.py==============
#!/usr/bin/env python
import sys
import string
CHAR_MAP=dict(zip(string.ascii_lowercase, string.ascii_lowercase[13:26] +
string.ascii_lowercase[0:13]))
def rotate13_letter(letter) :
"""
Return the 13-char rotation of a letter
"""
do_upper = False
if letter.isupper() :
do_upper = True
letter = letter.lower()
if letter not in CHAR_MAP :
return letter
else :
letter = CHAR_MAP[letter]
if do_upper :
letter=letter.upper()
return letter
if __name__ == '__main__' :
for line in sys.stdin :
for char in line :
sys.stdout.write(rotate13_letter(char))
===========sample.html===========
<html>
<head>
<title> Hello, World! </title>
</head>
<body>
<p>
Hi there, all of you earthlings
</p>
<p>
Take us to your leader.
</p>
</body>
</html>
===============TERMINAL============
this is what i run in the terminal,
cat sample.html | python rot13.py rot13.html
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