How to output from sage

edit

It really depends what your output is, but for some things you could do:

sage: f = file('/desired/path/output.txt','w')
sage: f.write(str(my_amazing_output))
sage: f.close()

Maybe I don't understand the question though.

with open("outputfilepath", 'w') as fp:
    for line in iterable: #assuming line is str with \n
        print >> fp, line
#implicit fp.close() here as "with" scope ends.

It's possible to redirect sys.stdout and sys.stderr temporarily to files. See Example 10.9. Redirecting output from Mark Pilgrim's Dive into Python.

Note: Redirecting stdout will also send the Sage prompt sage: to the output file. You can suppress most of the prompt with sage.misc.interpreter.set_sage_prompt(''). I don't know if it's also possible to remove the colon that IPython inserts.

And also by the way, you might find IPython's "magic" %logstart and %logstop commands somewhat useful. See %logstart? for options.