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As previously reported, Python’s Enhancement #340 pitches the addition of anonymous block statements, an effort to give a dash of Ruby to the firmly indented ledges of Python. But let’s not call it Rupy yet. An updated syntax is out in #343 which politely (and exhaustively) asks for a with keyword, which optionally invokes __enter__() and __end__() methods on the borders of the closure.

To give a taste of how this works, here’s an example which uses two blocks to manage temporary redirection of stdout to a file.

 @with_template
 def redirecting_stdout(new_stdout):
   save_stdout = sys.stdout
   sys.stdout = new_stdout
   try:
     yield None
   finally:
     sys.stdout = save_stdout

 with opening(filename, "w") as f:
   with redirecting_stdout(f):
     print "Hello world" 

Anyway, discussion is starting to accumulate today on the WithStatement wiki page.