[Tutor] searching a text file

زياد بن عبدالعزيز البات زياد بن عبدالعزيز البات
Wed Sep 5 12:55:10 CEST 2007

Alan Gauld wrote:
> "Diana Hawksworth" <dianahawks at optusnet.com.au> wrote
>> How do I find a particular name, change the score and then save
>> the changes back to the text file again??
> iterate over the file checking (and modifying) each line
> write the line back out:
> Pseudo code
> Out = open('foo.txt','w')
BEWARE: this will truncate the file immediately, erasing all the data in 

Use a temporary file and after you finish processing the data in the 
original file, move (or rename) the temporary file to the original name.

> for line in file('foo.txt'):
>     if 'somestring' in line:
>        line = 'I changed it\n'
>     Out.write(line)
> Out.close()
> You will find much more on this in my file handling topic in my 
> tutorial.


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