change a string in text file then write it

[Carel Fellinger]

Alex Martelli <aleaxit at yahoo.com> wrote:
...
> for line in fileinput.input("thefile.txt", inplace=1):
>     if re.search(myre, line):
>         line = string.replace(line,'foo','bar')
>     print line

Ah, this must be one of Alex favorite typos, omitting a trailing ',' :)

You see, the last line should actually read:
     print line,    #note the trailing ","

the lines you get from "fileinput.input('thefile.txt', inplace=1)" have
a trailing end-of-line symbol embedded if it was there in the input file.
The print statement adds a trailing end-of-line symbol regardless of
whether the string to write ended with one, *unless* you end the print
statement with a comma, then this adding is omitted.

-- 
groetjes, carel