open two files at once

[robek]

hi,
what is the simplest way to open two files (one for reading and 2nd for
writing) ?
i usually do:
with open('1') as f1:
with open('2','w') as f2:
for i in f1: do something with i
f2.write(i)

is there a simpler/better way to do this ?

 

[Peter Otten]

what is the simplest way to open two files (one for reading and 2nd for
writing) ?
i usually do:
with open('1') as f1:
with open('2','w') as f2:
for i in f1: do something with i
f2.write(i)

is there a simpler/better way to do this ?

Yours is the best way to do it in Python 2.6. In particular, don't use
contextlib.nested():

http://docs.python.org/library/contextlib.html#contextlib.nested

Python 2.7 allows writing

with open(source) as f1, open(dest, "w") as f2:
# ...

saving you one level of indentation.

Peter