[Tutor] small program, but I'm very confused

[Melissa K. Surprenant]

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When I copied the code, I must have made a mistake - both lines are indented 5 spaces in
the actual program.  I'm sorry.  I just looked it over, and everything else copied
correctly.

Kalle Svensson wrote:

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> [Melissa K. Surprenant]
> > I have to write a small program for class, and I'm having a terrible
> > time with it.  I wrote the program, and it seems to me like it should
> > work, but it doesn't.  I'm sure there are more errors than this, but
> > right now I get an error when I try to write to the file.  It says I
> > have invalid syntax, with a carat point towards the file name for the
> > following line:  f.write('\2\n')
> >
> > I would appreciate any help anyone would care to offer.  Thank you!
> >
> > Here is the code:
> ...
> > for y in loginsList:
> > re.findall(('^loginsList[y]:x:[0-9]{4}:[0-9]{2,3}:)([A-Za-z]\s[A-Za-z])(.*?)(/n)',
> > '/etc/passwd')
> >      f.write('\2\n')
> ...
>
> The thing is that Python uses indentation to determine scope.  That
> is, to see if some code should be executed inside or outside a for
> loop, Python looks at how the code is indented.
>
> def func1():
>     print "Hello",
>
> def func2():
>     print "World!"
>
> for x in range(3):
>     func1()
> func2()
>
> will result in the output
>
> Hello Hello Hello World!
>
> This means that the indentation must be consistent,
>
> for x in range(3):
>     func1()
>   func2()
>
> is wrong.  Python can't determine if the call to func2 (which is
> indented 2 spaces) should be inside (indented 4 spaces) or outside
> (indented 0 spaces) the loop and instead of guessing raises a syntax
> error to give you a chance to correct the code.
>
> Peace,
>   Kalle
> - --
> Kalle Svensson, http://www.juckapan.org/~kalle/
> Student, root and saint in the Church of Emacs.
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--
There are only 10 types of people in this world...those who understand binary, and those
who don't.


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