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      from django.db import migrations, models
def grow_tail(x, y):
    """Grow salamander tail."""
    pass
def shrink_tail(x, y):
    """Shrink salamander tail."""
    pass
class Migration(migrations.Migration):
    initial = True
    operations = [
        migrations.CreateModel(
            'Salamander',
            [
                ('id', models.AutoField(primary_key=True)),
                ('tail', models.IntegerField(default=0)),
                ('silly_field', models.BooleanField(default=False)),
            ],
        ),
        migrations.RunPython(grow_tail, shrink_tail),
    ]
 
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