如何在python for循环中构建整数+字符串的元组数组变量？

Question

Manually built variable STAFFLIST works in django database as a list of choices listed as PositiveSmallIntegerField.

STAFF1 = 1
STAFF2 = 2
STAFF3 = 3
STAFFLIST = (
    (STAFF1, _('John Doe')),
    (STAFF2, _('Lisa Beauty')),
    (STAFF3, _('Harry Potter')),
)

Print for this variable works as follows:

>>>print(STAFFLIST[1])
(2, 'Lisa Beauty')
>>> print(STAFFLIST[1][0])
2
>>> print(STAFFLIST[1][1])
Lisa Beauty
>>>

How to built this variable automatically in for loop based on the actual list of staffs? I was trying something like below, but unsuccsessful:

from django.contrib.auth.models import User
from django.utils.translation import gettext as _

staff = User.objects.filter(is_staff=True)
idx=0
for stf in staff:
    STAFFLIST[idx] = (stf.id, _(stf.first_name + ' ' + stf.last_name))
    idx=idx+1

I am getting error like:

TypeError: 'str' object does not support item assignment

I believe, my problem is low knowledge level of python datatypes. And currently, I am trying to work with tuple datatype and to store string inside.

Answer 1

I have solved the for loop problem. Folowing code works and builds the same tuple array as the manually defined variable:

from django.contrib.auth.models import User
from django.utils.translation import gettext as _

staff = User.objects.filter(is_staff=True)
idx=0
for stf in staff:
    if idx == 0:
        STAFFLIST = ((stf.id, _(stf.first_name + ' ' + stf.last_name)),)
        idx=1
    else:
        STAFFLIST = STAFFLIST + ((stf.id, _(stf.first_name + ' ' + stf.last_name)),)