read a file line by line using readline()

[Bruno Desthuilliers]

Phoe6 a écrit :
> Hi all,
> I just read the manual and got to know I can use a for loop to iterate
> through the lines in the file.
> 
> But so far, I was strugling with the following:
> 
> import os
> file = open('File1.txt','r')

'file' is the builtin type for file objects (like the one returned by 
open()). Avoid using it as an identifier, this shadows the file type.

> line = file.readline()
> while line !=' ':

As Thomas pointed out, this is not an empty string !-)

Also, this is not a for loop...

>     print line
>     line = file.readline()

Do yourself a favor, use a for loop. Also, a file opened in read mode is 
already an iterator :

f = open('path/to/file')
for line in f:
   do_something_with(line)
f.close()