What is the best way to handle a missing newline in the following case

Neil Cerutti neilc at norwich.edu
Fri Nov 5 16:54:41 CET 2010


On 2010-11-05, Paul Rudin <paul.nospam at rudin.co.uk> wrote:
> "danmcleran at yahoo.com" <danmcleran at yahoo.com> writes:
>>> The problem is when I get to the last line. When the program
>>> sees '\n' after the 9, everything works fine. However, when
>>> there isn't a '\n', the program doesn't process the last
>>> line.
>>>
>>> What would be the best approach to handle the case of the possible
>>> missing '\n' at the end of the file?
>>
>> use readines to read all lines into a list and then iterate thru the
>> list:
>>
>> f = open(r'c:\test.txt', 'rb')
>> print f.readlines()
>>
>>>>
>> ['1\r\n', '3\r\n', '5\r\n', '7\r\n', '3\r\n', '9']
>
> There's no real point in contructing a list. Just do
>
> with open(r'c:\test.txt') as f:
>    for l in f:
>        print int(l) 
>
> As long as you just have digits and whitespace then that's fine
> - int() will do as you want.

Keep in mind that a file that a text file that doesn't end with
a newline isn't strictly legal. You can expect problems, or at
least warnings, with other tools with such files.

-- 
Neil Cerutti



More information about the Python-list mailing list