Django NoArgsCommand gives NameError: name ' ' is not defined

I am trying to make a custom command to run on my celery crontabs, which extracts data from my db, makes a list, and then dumps that information as a list in redis. This list will then be used by other workers.

However, I am getting a NameError, which I haven't been able to solve despite reading relevant stack and Google posts.

My code below:

from django.core.management.base import NoArgsCommand, CommandError
 from detail.models import SD
 import redis
 
 class Command(NoArgsCommand):
 
     help = 'Gathers the symbols from the database and generates a list for crontabs, saving to redis.'
 
     def handle_noargs(self, **options):
 
         all = SD.objects.all()
 
         data = []
 
         for info in all:
             data.append(info.symb)  
 
         r = redis.Redis()
 
         try:
             r.delete('allsymbols')
         except:
             pass
 
         for xyz in data: **<---- the NameError refers to this line**
             r.rpush('allsymbols', xyz)
 

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