It depends. Usually, you would declare the variable in __init__(). It has
two advantages:
1. Your code becomes more readable and easy to understand. Looking at the
__init__() one can tell right away what variables will be used.
2. All the methods using that variable anywhere in the class will have no
trouble finding it.
It is a well-known python idiom where if a variable is not found, you can
create it on the fly and then it becomes available for to all the instance
methods.
try:
myVar
except AttributeError:
# create my var
self.my_var = 'some var'
Also, if you need to create the varaible using some method then it is easy
to do in __init__ also:
class Foo(object):
def __init__(self, *args, **kwargs):
self.my_var = self._get_my_var()
def _get_my_var(self):
return 'some var'
On Wed, May 17, 2017 at 7:41 PM, Justin Israel <[email protected]>
wrote:
>
>
> On Wed, May 17, 2017, 9:39 PM Rudi Hammad <[email protected]> wrote:
>
>> Hi, another question about programing style.
>> Many times I create a variable in a method (not the __init__) that I use
>> in another method. And to do this I have to make that variable an attribute
>> of object with self.myVariable
>> My question is if I it is okey to do this:
>>
>> def foo(self):
>> myVar = "something"
>> cmds.joint(n=myVar)
>> ....more code here that uses myVar
>> ....
>> ....
>> self.myVar = myVar
>>
>>
>> Is this a normal thing to do, or should I right directly from the
>> beginning self.myVar = "something"
>> The main reason is to keep things a little bit shorter, and not see self.
>> repited all over the code.
>>
>
> As long as you don't trigger any methods in your elided "more code" which
> will rely on that attribute to exist, then it would be fine.
>
> It is normally safer to set the fields to a default value in your__init__.
> Especially public attributes.
>
>
>>
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