check carriage return is there in a given string

Question

i,m reading some lines from a file and i'm checking whether each line has windows type of CRLF or not. If either '\n' or '\r' is absent in any line, it has to report an error. I tried with the below code, even if the line doesnt have '\r', it is not reporting any error

Open_file = open(File_Name,'r').readlines()
while Loop_Counter!= Last_Line:
        Line_Read = Open_file[Loop_Counter]
        if('\r\n' in Line_Read):
            pass
        else:
            print Loop_Counter

Thank you

Answer 1

This isn't working because Loop_Counter is never adjusted at all; whatever the initial value is, it's not changing and the while loop either runs indefinitely or never passes. Your code is pretty unclear here; I'm not sure why you'd structure it that way.

What you're suggesting would be easier to do like this:

infile = open(filename, 'rb')
for index, line in enumerate(infile.readlines()):
    if line[-2:] != '\r\n':
        print index

The 'rb' argument is necessary to make sure the newlines are read as \r\n and not just as \n.