from
itertools
import
izip_longest
from
contextlib
import
nested
names
=
(
'file1'
,
'file2'
)
with
nested
(
*
map
(
open
,
names
)
)
as
files:
for
line
in
(
line
for
pair
in
izip_longest
(
*files
)
for
line
in
pair
if
line
)
:
print
line.
strip
(
)