TABLE testtable
testcolumn1 | testcolumn2 | testcolumn3
------------+-------------+------------
 horse      | cow         | goat
 simple     | code        | test
 cant       | figure      | this


conn = psycopg2.connect("dbname='test' user='me' password='pass'")
cursor = conn.cursor()
cursor.execute("select * from testtable")
cursor_rows = cursor.fetchall()
for row in cursor_rows:
    print(row['testcolumn2'])

# the result of the loop should be
cow
code
figure