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from argparse import ArgumentError
from django.core.management.base import BaseCommand, CommandError
class Command(BaseCommand):
def add_arguments(self, parser):
try:
parser.add_argument("--version", action="version", version="A.B.C")
except ArgumentError:
pass
else:
raise CommandError("--version argument does no yet exist")
def handle(self, *args, **options):
return "Detected that --version already exists"
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