new_contents: """add tasks table
  
  Revision ID: b764aaedf10d
  Revises: 
  Create Date: 2017-10-29 14:56:07.313468
  
  """
  # pylint: skip-file
  
  from alembic import op
  import sqlalchemy as sa
  
  
  # revision identifiers, used by Alembic.
  revision = 'b764aaedf10d'
  down_revision = None
  branch_labels = None
  depends_on = None
  
  
  def upgrade():
      # ### commands auto generated by Alembic - please adjust! ###
      op.create_table('tasks',
      sa.Column('id', sa.Integer(), nullable=False),
      sa.Column('title', sa.String(), nullable=False),
      sa.Column('description', sa.String(), nullable=False),
      sa.Column('status', sa.String(), nullable=False),
      sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('now()'), nullable=False),
      sa.Column('updated_at', sa.DateTime(timezone=True), server_default=sa.text('now()'), nullable=False),
      sa.PrimaryKeyConstraint('id', name=op.f('pk_tasks'))
      )
      # ### end Alembic commands ###
  
  
  def downgrade():
      # ### commands auto generated by Alembic - please adjust! ###
      op.drop_table('tasks')
      # ### end Alembic commands ###
  
subject: add first alembic revisin that creats `tasks` table