Hello Arthur,
not there yet....
A.T.Hofkamp wrote:
The simplest solution would be to construct a new line from the old
one directly below the 'while', for example
line2 = line[:-1] + " -d\n"
followed by writing line2 to disk.
Actually, I don't quite understand. You want me to put
line2 = line[:-1] + " -d\n"
right beneath the 'while', that is, without indenting it?? Never seen
that before...
Here is my latest try, which works:
# add " -d" to each line of a textfile
infile = open("step3", 'r') # open file for appending -- returns a file
object
outfile = open("pyout","a") # open file for appending -- returns a file
object
line = infile.readline() # Invokes readline() method on file
for i in line:
line2 = line[:-1] + " -d\n"
outfile.write(line2), # trailing ',' omits newline character
line = infile.readline()
infile.close()
outfile.close()
print "done!"
But I clearly still don't understand my own code.
In particular I don't understand why I have to use infile.readline()
twice, once before the for loop, and once inside it.
Finally: changing the line "for i in line:" for "while line:" will
freeze the machine, filling my hard disk.
Any ideas?
David
_______________________________________________
Tutor maillist - Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor
