[Tutor] reading file, adding to each line, writing file

[Kent Johnson]

On Wed, Feb 4, 2009 at 10:18 AM, OkaMthembo <zebra05 at gmail.com> wrote:
> The following is adapted from my humble text processing script that i use at
> work for a recurring task of mine. Any excuse not to use Java all day :)
>
> There was an error with my other posts. Pardon the triple posting - won't
> happen again soon.
>
>
>
>     file_1 = open('step2', 'r+')
>     lines = file_1.readlines()
>     sentences = []
>     for line in lines:
>         if line:

I don't think line will ever be empty, so this test is not needed.

>             sentences.insert(len(sentences), line + '-d')

sentences.append(line + '-d') is simpler. Note this appends after the
newline so it is not really what the OP wants.

>     file_1.close()
>     file_2 = open('pyout', 'w+')
>     if len(sentences) > 0:

This test is not needed, if sentences is empty the for statement won't
do anything.

>         for sentence in sentences:
>             file_2.write(sentence)

The loop could be replaced with
file_2.writelines(sentences)

Kent