En Mon, 19 Mar 2007 05:35:00 -0300, momobear <[EMAIL PROTECTED]> escribió:
>> > in C++ language we must initilized a variable first, so there is no
>> > such problem, but in python if we don't invoke a.boil(), we will not
>> > get self.temp to be initilized, any way to determine if it's initilzed
>> > before self.temp be used.
>
> sorry, I should add more code to implement my ideas.
> class coffee:
> def __init__(self):
> '''
> do something here
> '''
> def boil(self):
> self.temp = 80
>
> a = coffer()
> if a.temp > 60:
> print "it's boiled"
Apart from the other suggestions (ensure full initialization in __init__,
using getattr, using hasattr) you may consider using a class attribute as
a default value:
class Coffee:
temp = 50
def __init__(self):
"do something"
def boil(self):
self.temp = 80
a = Coffee()
print a.temp # 40
a.boil()
print a.temp # 80
--
Gabriel Genellina
--
http://mail.python.org/mailman/listinfo/python-list
