title: get table columns from sqlAlchemy table model
body: <p>I have a table where I would like to fetch all the column names however after browsing the interwebs I could not find a way that works. This is what my table looks like:</p>
  
  <pre><code>class myTable(Base):
      __tablename__ = 'myTable'
  
      col1 = Column(Integer, primary_key=True)
      col2 = Column(Unicode(10))
      col3 = Column(Integer)
  
      col4 = Column(Numeric(10, 6))
      col5 = Column(Numeric(6,3))
      col6 = Column(Numeric(6,3))
  
      child = relationship('tChild',
                            backref=backref('children'))
  </code></pre>
  
  <p>I would like to be able to print all the column names from a for loop. ex: </p>
  
  <pre><code>"col1", "col2", "col3".... etc
  </code></pre>
  
  <p>This is pretty easy with regular sql but I can't seem to figure out how to do it using sqlAlchemy table models</p>