TypeError 'User' object is not iterable

Question

aren't instances of class iterable in python as it is possible in java ,.,

class User(models.Model):
    first_name =  models.CharField(max_length=50)
    ref_num = models.IntegerField()



ref_list = [2,3]
user_list = [User(first_name='abc',ref_num=1)]

for ref in ref_list:
    user_list.extend(User(first_name='abc',ref_num=ref))

but getting error as :

To elaborate, extend takes the contents of a list, item for item, and appends them to another list. append adds an item to the end of a list. Therefore, extend expects to get a listlike as its input, whereas append will take anything. — aruisdante
– aruisdante, Commented Jun 1, 2014 at 15:46
@aruisdante thanx for detailed explaination on append's behaviour... — jacquel
– jacquel, Commented Jun 1, 2014 at 16:00

Jon Clements · Accepted Answer · 2014-06-01 15:45:33Z

2

If you want to add a single instance of an object, then you can use .append, but in this case you may as well build a generator and .extend the list, eg:

ref_list = [2,3]
user_list = [User(first_name='abc',ref_num=1)]

user_list.extend(User(first_name='abc', ref_num=ref) for ref in ref_list)

Remember though, that unless you .save() those model objects, they won't persist in your DB.

answered Jun 1, 2014 at 15:45

Jon Clements

143k34 gold badges254 silver badges288 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

TypeError 'User' object is not iterable

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related