printing a sequence...
Lonnie Princehouse
finite.automaton at gmail.com
Fri Jul 16 13:53:44 EDT 2004
To clarify what's already been said-
thing.__str__() is equivalent to str(thing)
thing.__repr__() is equivalent to repr(thing)
str(some_list) will call repr() for all of the list's items.
You could try:
print map(str, a)
or
print [str(x) for x in a]
for the desired effect, or you could overload __repr__ instead of __str__
"Florian Preknya" <bolo at coco.ro> wrote in message news:<cd8a1u$t6d$1 at nebula.dnttm.ro>...
> Hi everybody,
>
> I'm relatively new in using Python and I want to perform a simple job: I
> have a list of objects of type A and want to print them to stdout.
>
> class A:
> def __init__(self, value):
> self.value = value
>
> def __str__(self):
> return "value: %d" % self.value
>
> a = [A(10), A(12), A(2)]
> print str(a)
>
> I obtain [<__main__.A instance at 0x00767D80>, <__main__.A instance at
> 0x00768698>, <__main__.A instance at 0x00768350>].
> What I want to obtain is [value: 10, value: 12, value: 2].
>
> I know that if I change the __str__ to __repr__ I obtain what I want, but
> then I will have these informal strings in debuger also, and I do not want
> that.
>
> Can I write somehow the print statement to force calling the A.__str__
> function?
>
> Thanks,
> Florian.
More information about the Python-list
mailing list