Re: [Tutor] try except block for multiple statements
On Sun, Dec 7, 2008 at 12:25 PM, Lie Ryan <[EMAIL PROTECTED]> wrote: > texts = ["a = %s\n" % plan.a, > "b = %s\n" % plan.b, > "c = %s\n" % plan.c, > "d = %s\n" % plan.d >] > > for text in texts: >try: >fo.write(text) >except AttributeError: >pass No, the AttributeError will come during the creation of texts, not in the loop. Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] try except block for multiple statements
On Mon, 01 Dec 2008 20:44:20 -0500, Bryan Fodness wrote:
> I would like to use a try except to see if a value exists. But, when I
> use the following, if a does not exist it exits. I understand why this
> does this, but is there a way to get b,c, and d if a does not exist
> without using a try except for every statement?
>
> try:
> fo.write("a = %s\n" %plan.a)
> fo.write("b = %s\n" %plan.b)
> fo.write("c = %s\n" %plan.c)
> fo.write("d = %s\n" %plan.d)
> except AttributeError:
> pass
Or:
texts = ["a = %s\n" % plan.a,
"b = %s\n" % plan.b,
"c = %s\n" % plan.c,
"d = %s\n" % plan.d
]
for text in texts:
try:
fo.write(text)
except AttributeError:
pass
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Re: [Tutor] try except block for multiple statements
Bryan Fodness wrote:
I would like to use a try except to see if a value exists. But, when
I use the following, if a does not exist it exits. I understand why
this does this, but is there a way to get b,c, and d if a does not
exist without using a try except for every statement?
try:
fo.write("a = %s\n" %plan.a)
fo.write("b = %s\n" %plan.b)
fo.write("c = %s\n" %plan.c)
fo.write("d = %s\n" %plan.d)
except AttributeError:
pass
def foo(obj, attr):
val = getattr(obj, attr, None)
if val is not None:
obj.write("%s = %s\n" % (attr, val))
foo(plan, "a")
foo(plan, "b")
foo(plan, "c")
foo(plan, "d")
--
"Any intelligent fool can make things bigger, more complex, and more
violent. It takes a touch of genius - and a lot of courage - to move
in the opposite direction. " -Albert Einstein
___
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--
Bob Gailer
Chapel Hill NC
919-636-4239
___
Tutor maillist - Tutor@python.org
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Re: [Tutor] try except block for multiple statements
On 02/12/2008, Bryan Fodness <[EMAIL PROTECTED]> wrote:
> I would like to use a try except to see if a value exists. But, when I use
> the following, if a does not exist it exits. I understand why this does
> this, but is there a way to get b,c, and d if a does not exist without using
> a try except for every statement?
>
> try:
> fo.write("a = %s\n" %plan.a)
> fo.write("b = %s\n" %plan.b)
> fo.write("c = %s\n" %plan.c)
> fo.write("d = %s\n" %plan.d)
> except AttributeError:
> pass
AFAIK, no -- but you could always use a loop.
attrs = ['a', 'b', 'c', 'd']
for attr in attrs:
try:
fo.write('A = %s\n' % getattr(plan, attr))
except AttributeError:
pass
--
John.
___
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[Tutor] try except block for multiple statements
I would like to use a try except to see if a value exists. But, when I use
the following, if a does not exist it exits. I understand why this does
this, but is there a way to get b,c, and d if a does not exist without using
a try except for every statement?
try:
fo.write("a = %s\n" %plan.a)
fo.write("b = %s\n" %plan.b)
fo.write("c = %s\n" %plan.c)
fo.write("d = %s\n" %plan.d)
except AttributeError:
pass
--
"Any intelligent fool can make things bigger, more complex, and more
violent. It takes a touch of genius - and a lot of courage - to move in the
opposite direction. " -Albert Einstein
___
Tutor maillist - Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor
