new_contents: """empty message
  
  Revision ID: 7b97702f5e09
  Revises: 
  Create Date: 2017-03-19 00:09:24.081505
  
  """
  from alembic import op
  import sqlalchemy as sa
  
  
  # revision identifiers, used by Alembic.
  revision = '7b97702f5e09'
  down_revision = None
  branch_labels = None
  depends_on = None
  
  
  def upgrade():
      pass
  
  
  def downgrade():
      pass
  
subject: create migration file