Oscar Benjamin <oscar.j.benja...@gmail.com> Wrote in message:
> On 17 February 2014 13:16, Dave Angel <da...@davea.name> wrote:
>> On 02/17/2014 06:12 AM, Oscar Benjamin wrote:
>>>
>>> Something like this:
>>>
>>> with open(r'D:\file3.txt', 'r+') as fout:
>>> keywords_seen = set()
>>> for filename in r'C:\File1.txt', r'C:\File2.txt':
>>> with open(filename) as fin:
>>> for line in fin:
>>> keyword = line.strip()
>>> if keyword not in keywords_seen:
>>> fout.write(line)
>>> keywords.add(keyword)
>
> The line above should obviously be keywords_seen.add(keyword)
>
>> You forgot to append the newline to strings in the write() method calls.
>>
>> fout.write(line + "\n")
>
> Iterating over a file keeps the newlines:
>
>>>> list(open('file1.txt'))
> ['file1\n', 'file2\n']
>
Sorry, I read your code too quickly and figured you had done an
in-place strip(). Since you did not, you run the risk of
encountering a file without trailing newline.
I prefer to at least rstrip each line, then add the newline back
in when writing.
--
DaveA
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