On Fri, Mar 8, 2013 at 2:26 AM, Νίκος Γκρ33κ <nikos.gr...@gmail.com> wrote: > Τη Πέμπτη, 7 Μαρτίου 2013 5:13:24 μ.μ. UTC+2, ο χρήστης Chris Angelico έγραψε: >> On Fri, Mar 8, 2013 at 2:01 AM, Νίκος Γκρ33κ <nikos.gr...@gmail.com> wrote: >> >> > os.system( 'python metrites.py > %s' ) % htmltemp >> >> >> >> Manually step through what this line should do. Follow the exact same >> >> rules Python will follow in evaluating this expression. >> >> >> >> http://docs.python.org/2/reference/expressions.html#operator-precedence >> >> http://docs.python.org/3/reference/expressions.html#operator-precedence >> >> >> >> As you'll see from footnote 8 or 5 (depending on which version of the >> >> docs), your percent operator is the same one listed in the table as a >> >> division operator. >> >> >> >> Now. Go through that expression, step by step. Walk through everything >> >> the Python interpreter does. Figure out exactly what happens first, >> >> second, third. Figure out when your percent operator gets handled. >> >> Then you'll know what's wrong with that line of code. >> >> >> >> You'll also gain a very useful understanding of Python, and more >> >> generally of the way most high level languages parse expressions. >> >> >> >> ChrisA > > I'am sorry to say i cant figure this out :( > please enlight me.
You can figure it out, but it will take some effort. I will not enlighten you further. The documentation is all there; the answers are available. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
