code: def handle(self, *args, **options):
      for processor in Processor.objects.all():
          processor.delete()
      for result in Result.objects.all():
          result.delete()
      for preset in Preset.objects.all():
          preset.delete()
      for exp in Experience.objects.all():
          exp.delete()
      # for task in Task.objects.all():
      #    task.delete()
      for analysis in Analysis.objects.all():
          analysis.delete()
      for subproc in SubProcessor.objects.all():
          subproc.delete()
  
file_path: TimeSide/timeside/server/management/commands/timeside-empty-db.py
imports: from optparse import make_option
  from django.conf import settings
  from django.core.management.base import BaseCommand, CommandError
  from django.contrib.auth.models import User
  from django.template.defaultfilters import slugify
  from django.core.exceptions import MultipleObjectsReturned
  import os
  import timeside.core
  from timeside.server.models import Selection, Item
  from timeside.server.models import Processor, Preset, Result, Experience, Task, Analysis, SubProcessor
  from timeside.server.models import _PENDING, _DONE
  from timeside.core.tools.test_samples import generateSamples
label_desc: Use image node_id 1 for calling the Command obj's underlying member method code with example usage: obj.handle() without return types