How to handle both `with open(…)` and `sys.stdout` nicely?

Question

Often I need to output data either to file or, if file is not specified, to stdout. I use the following snippet:

if target:
    with open(target, \'w\') as h         


        

Answer 1

Another possible solution: do not try to avoid the context manager exit method, just duplicate stdout.

with (os.fdopen(os.dup(sys.stdout.fileno()), 'w')
      if target == '-'
      else open(target, 'w')) as f:
      f.write("Foo")