Modifying a row in a textfile

[Olli Virta]

Hi!

I got a textfile made out of database records. Is there an easy way to
modify rows in that file in case you have to take away some items here
and there from each rows.

Tanks! OV

 

[Diez B. Roggisch]

Hi!

I got a textfile made out of database records. Is there an easy way to
modify rows in that file in case you have to take away some items here
and there from each rows.

for line in inf.readlines():
if matches_criteria(line):
line = modify_line(line)
outf.write(line)


Diez

 

[Jorgen Grahn]

for line in inf.readlines():
if matches_criteria(line):
line = modify_line(line)
outf.write(line)

In other words, no. You need to put the results in another file.

/Jorgen

 

[Dave Angel]

In other words, no. You need to put the results in another file.

/Jorgen

If it is important that this ends up in the same file, you can simplify
the code by using fileinput.input() with the "inplace" paramater. It
renames the input file, redirects stdout to a new file with the original
name, and deletes the renamed file, all at appropriate times. There are
a few caveats, so be careful. The main caveat is to make sure you close
the file.

DaveA