How to print all columns in SQLAlchemy ORM

Question

Using SQLAlchemy, I am trying to print out all of the attributes of each model that I have in a manner similar to:

SELECT * from table;

How

Answer 1

Probably the shortest solution (see the recent documentation):

from sqlalchemy.inspection import inspect
columns = [column.name for column in inspect(model).c]

The last line might look more readable, if rewrite it in three lines:

table = inspect(model)
for column in table.c:
    print column.name

Answer 2

print repr(model.__table__)

Or just the columns:

print str(list(model.__table__.columns))

Answer 3

Building on Rodney L's answer:

model = MYMODEL
columns = [m.key for m in model.__table__.columns]

Answer 4

This is an old post, but I ran into a problem with the actual database column names not matching the mapped attribute names on the instance. We ended up going with this:

from sqlalchemy import inspect
inst = inspect(model)
attr_names = [c_attr.key for c_attr in inst.mapper.column_attrs]

Hope that helps somebody with the same problem!