Charles Cazabon wrote:
> Fredrik Lundh <[EMAIL PROTECTED]> wrote:
> > next use case:
> >
> > print 'foo:', foo, 'bar:', bar, 'baz:', baz,
> > if frobble > 0:
> > print 'frobble', frobble
> > else:
> > print 'no frobble today'
>
> The need to print /and/ not add a newline isn't nearly as common. print()
> could take a keyword parameter to skip the newline, or ...
>
> print('foo:', foo, 'bar:', bar, 'baz:', baz,
> frobble and 'frobble: ' + frobble or 'no frobble today')
>
> Or the user can just use stdout.write and have full control.
Or you can easily refactor your code to do the print in one line:
if frobble > 0:
frobble_str = 'frobble: ' + frobble
else:
frobble_str = 'no frobble today'
print('foo:', foo, 'bar:', bar, 'baz:', baz, frobble_str)
or similarly:
if frobble > 0:
rest = ['frobble', frobble]
else:
rest = ['no frobble today']
print('foo:', foo, 'bar:', bar, 'baz:', baz, *rest)
I don't know which refactoring you'd prefer, but there are at least a
few options here. In the first one you have to be careful to add the
extra space yourself. In the second one, you have to know how *args
work. But I would claim that the extra mental burden of manually
adding a space or understanding *args is about equivalent to the
current mental burden of print's trailing-comma behavior.
I also find it more obvious in both refactored examples that the print
produces exactly one line.
Of course, there are examples that don't refactor so easily. Here's one:
for i, obj in enumerate(objs):
# do stuff
print i, obj,
# do more stuff
print
If the "do stuff" and "do more stuff" sections are empty, you can
write it as something like:
print(*[item for tup in enumerate(objs) for item in tup])
But it's clearly not as beginner-friendly, requiring knowledge of
*args and list comprehensions. OTOH, I'd claim that if you need such
exacting format, you're not doing beginner stuff anyway. But YMMV.
STeVe
--
You can wordify anything if you just verb it.
--- Bucky Katt, Get Fuzzy
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