J wrote:
I was reading something from a code review a little while ago and saw
something that's got my curiosity up...
Say I had a file, foo.txt that I wanted to read from, only one time
and only read.
So what's the difference between this:
mylist = Popen(["cat","foo.txt"], stdout=PIPE).communicate()[0].splitlines()
and this:
f = open('foo.txt')
mylist = f.readlines()
f.close
That last line should be:
f.close()
Is there a reason why you would not use subprocess.Popen for this,
other than just not relying on external programs to perfrom the task?
what if that file only has one line in it, and that's all you're
interested in, and the file is guaranteed to only have that one line
it it?
For example:
say foo.txt contained only the number 123456789
what's wrong with doing this:
my_int = int(commands.getoutput('cat foo.txt')
or via the subprocess.Popen method mentioned above?
Why would you want to call an external program to do something when you
could do it directly? It seems like a strange thing to do, like driving
to your kitchen! :-)
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