Steven D'Aprano wrote:
On Sat, 13 Mar 2010 01:04:42 pm Ray Parrish wrote:
print "A %s with dimensions %sx%s has an area of %s." %
(choice, height, width, width*height)
Hello,
Isn't it a little more understandable to use a
construct like the following?
print "The area of a " + Choice + "is " str(Width) + " x " +
str(Height) + " equals " + str(Width * Height) + "
square feet"
The area of a rectangle is 12 x 10 equals 120
square feet.
I find that putting the variables on the end like
that, when you're not actually applying any special formatting to them
makes it less readable
when I'm debugging my stuff, or when someone else
is reading my code,
and trying to understand it.
Of course you are welcome to use whatever coding standards you like, but
I think you will find that among experienced coders, you are in a
vanishingly small minority. As a beginner, I found string interpolation
confusing at first, but it soon became second-nature. And of course,
there are legions of C coders who are used to it.
I find an expression like:
"The area of a " + Choice + "is " str(Width) + " x " + str(Height)
+ "equals " + str(Width * Height) + "square feet"
difficult to follow: too many quotes, too many sub-expressions being
added, too many repeated calls to str(), it isn't clear what is the
template and what is being inserted into the template. It is too easy
to miss a quote and get a SyntaxError, or to forget to add spaces where
needed. To me, this is MUCH easier:
template = "The area of a %s is %s x %s equals %s square feet"
print template % (Width, Height Width*Height)
One pair of quotes instead of five, no problems with remembering to add
spaces around pieces, and no need to explicitly call str().
OK, that does seem a bit easier now to me. I'm going to have to read up
on the %s, and any other formatting % codes there are however, since I'm
dead green in Python yet. 8-)
So, would I read about those in the string module portion of the
documentation?
Thanks, Ray Parrish
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