Odoo is the world's easiest all-in-one management software.
It includes hundreds of business apps:
My question is bit pythonic. but I am curious to know the answer.
I have seen in method Odoo is passing context=None. like
def create(self, cr, uid, vals, context=None):
if not context: context = {}
'''
code
'''
Why they have not used context={}? like
def create(self, cr, uid, vals, context={}):
'''
code
'''can anyone shade light on it?
Because {} is mutable and None is immutable.
Mutable default values are awkward: if you change the value in you function it will also change the *default* value for all later calls of your function.
See https://doc.odoo.com/contribute/15_guidelines/coding_guidelines_framework/#the-infamous-context
The lengthy discussion about that here: https://bugs.launchpad.net/openobject-addons/+bug/525808
This notation in python mean that context is a optionnal arg of the function. If no context is given, context is equal to none.
Créez un compte dès aujourd'hui pour profiter de fonctionnalités exclusives et échanger avec notre formidable communauté !
S'inscrire| Publications associées | Réponses | Vues | Activité | |
|---|---|---|---|---|
|
3
déc. 17
|
12885 | ||
|
1
juil. 25
|
2620 | ||
|
1
févr. 25
|
2002 | ||
|
0
janv. 24
|
5374 | ||
|
2
janv. 19
|
22995 |
1. Use the live chat to ask your questions.
2. The operator answers within a few minutes.
