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From: Harry George <harry.g.george at boeing.com>
Subject: Re: String formatting strangeness
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Date: Fri, 13 May 2005 14:03:03 GMT
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dark.ryder at gmail.com writes:

> I must be doing something wrong, but for the life of me, I can't figure
> out what.  Here's the code snippet which is giving me grief:
> 
> print type(number), type(name), type(seconds // 60), type(seconds % 60)
> print "\t\t\t<section number=\"%i\" title=\"%s\" length=\"%i:%i\"/>\n"
> % [number, name, seconds // 60, seconds % 60]
> 
> (These are lines 49 and 50 of the script; I can post the whole thing if
> someone wants, but I think this is enough to see why it's driving me
> nuts.)
> 
> And the output:
> 
> <type 'int'> <type 'str'> <type 'int'> <type 'int'>
> Traceback (most recent call last):
>   File "X:\Music (FLAC)\Post-process new rips.py", line 50, in ?
>     print "\t\t\t<section number=\"%i\" title=\"%s\"
> length=\"%i:%i\"/>\n" % [number, name, seconds // 60, seconds % 60]
> TypeError: int argument required
> 
> Wait, what?  The first line clearly identifies that the the first,
> third, and fourth elements are all integers, yet the error says that
> *lack* of integers is the problem.  If I change all "%i"s to "%d", I
> get the same problem, and changing to "%s" (hey, it was worth a shot)
> gives "TypeError: not enough arguments for format string" instead.
> Huh?  I see four placeholders and a four-element tuple.
> 
> Can anyone enlighten me here?
> 

I notice you used a list instead of a tuple.   
Changing to a tuple gives the desired output:

number=1
name="myname"
seconds=250
print "\t\t\t<section number=\"%i\" title=\"%s\" length=\"%i:%i\"/>\n" \
    % (number, name, seconds // 60, seconds % 60)
			
<section number="1" title="myname" length="4:10"/>

I have no idea why a list has that effect.

PS:  When writing XML and HTML, I use single quotes, so I don't have to 
escape double quotes:
print '\t\t\t<section number="%i" title="%s" length="%i:%i"/>\n' \
    % (number, name, seconds // 60, seconds % 60)


-- 
harry.g.george at boeing.com
6-6M21 BCA CompArch Design Engineering
Phone: (425) 294-4718