How to open multiple files using with open

You are creating a program that opens and modifies multiple files at once. with I want to open several files per line using the sentence, but it doesn't work because I write it like the code below

I want to write it as short as possible, what should I do?

try:
  with open('a', 'w') as a and open('b', 'w') as b:
    do_something()
except IOError as e:
  print 'Operation failed: %s' % e.strerror