title: SQLAlchemy Default DateTime, now plus n days from now
body: <p>I want to have a column with DateTime type which has a default value of 30 days from now</p>
  
  <p>I cant set default now using <code>default=datetime.datetime.utcnow</code> but when I try to use something like <code>default=(datetime.datetime.utcnow + datetime.timedelta(days=30))</code></p>
  
  <p>It returns and error <code>TypeError: unsupported operand type(s) for +: 'builtin_function_or_method' and 'datetime.timedelta'</code></p>
  
  <p>A better example of my code:</p>
  
  <pre><code>class Example(Base):
      id = Column(Integer, primary_key=True)
      name = Column(String, nullable=False, unique=True)
      date = Column(DateTime, default=(datetime.datetime.utcnow + datetime.timedelta(days=30)))
  </code></pre>
  
  <p>How can I do this without hardcoding?</p>