[Tutor] thesaurus

[Pete Froslie]

thanks for the advice Alan.. I am wondering about the following:

new_word = response3[2]
old_word = response[word_number]

#this works but adds carriage returns*********
for line in fileinput.FileInput("journey_test.txt",inplace=1):
   line = line.replace(old_word, new_word)
   print line

It seems that if I put it in at the difficulty location it works, but it
also adds carriage returns to the entire text file. Basically it ends up
double spacing a single-spaced document.  I'm also not sure if this is
causing the trouble you suggested against (writing and reading at the same
time).

cheers

On Sat, Jul 11, 2009 at 3:38 PM, ALAN GAULD <alan.gauld at btinternet.com>wrote:

> > I am having trouble with probably the most simple part:
> > I cannot seem to go back into the 'txt' file and replace the word I just
> > searched with the new word!
>
> Its not a good idea to try to read and write to the same file at the same
> time. The normal approach is to weither ead the file into memory and
> process it then write it back to the file or to open a second file and
> write to that then copy the second file over the original.
>
> > One with re.sub, which I can't seem to get to work
>
> re.sub works on a text string it doesn't affect the file.
>
> read the content into a string, close the input file.
> Use re.sub to make the changes (or even just the replace
> method of strings) then write the changed string back out
> to the file.
>
> HTH,
>
> Alan G
>



-- 
Pete Froslie
617.314.0957
http://www.froslie.net
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