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Try:
for item in stuff:
os.system(item[0])
print item[1]
Alternativly:
for cmd, msg in stuff:
os.system(cmd)
print msg
Andreas
James wrote:
> All,
>
> I have a dumb question...hopefully someone can shed some light on the
> difference between for and while in the situation below.
>
> I'm trying to iterate through a list I've created. The list consists
> of a command, followed by a 'logging' message (a message printed to a
> console or log file after the command is run).
>
> Here's a small snippet of code:
>
> # a list which includes (1) a command, and (2) something to be
> dumped into a log file after the command runs
> stuff = [ ["cat /etc/password"] , ["viewed /etc/password"] ]
>
> #works
> i = 0 ; j = 1
> while i < len( stuff ):
> os.system( str( stuff[ i ] ) )
> print stuff[ j ]
> i += 1 ; j += 1
>
> The while loop does precisely what it should do: it runs the first
> command using os.system(), and then prints out the string in the
> second position of the list.
>
> Then I tried to do the same thing with a for loop that looks
> logically equivalent. I replaced the while loop with this for loop:
>
> # doesn't work
> for i in len( stuff ):
> os.system( stuff[ i ] )
> j = i + 1
> print stuff[ j ]
>
> Python doesn't like it, though. It gives me the following error:
>
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> TypeError: 'int' object is not iterable
>
> What precisely causes this error? I come from a C background, and
> while and for loops can be molded to do precisely the same thing; it
> doesn't seem like this is the case in this scenario.
>
> Thoughts/ideas appreciated. :)
>
> Thanks!
> .james
> _______________________________________________
> Tutor maillist - Tutor@python.org
> http://mail.python.org/mailman/listinfo/tutor
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