text: from alembic import op
  import sqlalchemy as sa
  
  revision = "aaaaaaaaaaaa"
  down_revision = None
  branch_labels = None
  depends_on = None
  
  
  def upgrade():
      op.create_table(
          "foo",
          sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
          sa.PrimaryKeyConstraint("id"),
      )
  
  
  def downgrade():
      op.drop_table('foo')
  