Greetings to everybody,
I have recently started to solve my first Python problems but I came across to
this:
Write a version of a palindrome recogniser that accepts a file name from the
user, reads each line, and prints the line to the screen if it is a
palindrome.(by http://www.ling.gu.se/~lager/python_exercises.html)
I think I coded it correctly but still I get no output. I do not have any
errors I just do not get any output.
This is the code:
***
import is_palindrome
filename = raw_input('Enter a file: ') # A text file
f = open(filename)
while True:
line = f.readline()
if len(line) == 0:
break
elif is_palindrome.is_palindrome(line):
print line,
f.close()
***
I have coded the is_palindrome module before and it works very well.
Here is this module's code:
***
def reverse(text):
return text[::-1]
def replace_all(text, dic):
for i, j in dic.iteritems():
text = text.replace(i, j)
return text
def is_palindrome(text):
return text == reverse(text)
points = {'.':'', ',':'', '!':'', ';':'', '?':'', '/':'', '\\':''}
something = raw_input('Enter text: ').lower().replace(' ', '')
replace = replace_all(something, points)
if is_palindrome(replace):
print 'Yes, it is a palindrome:', reverse(replace)
else:
print 'No, it is not a palindrome:', reverse(replace)
***
What should I do to output only the palindrome lines from the text file?
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