[Python-Dev] anonymous blocks

[Greg Ewing]

Ka-Ping Yee wrote:

> Can you explain what you meant by currying here?  I know what
> the word "curry" means, but i am having a hard time seeing how
> it applies to your example.

It's currying in the sense that instead of one function
which takes all the args at once, you have a function
that takes some of them (all except the thunk) and
returns another one that takes the rest (the thunk).

>  Could you make up an example that uses more arguments?

   def with_file(filename, mode):
     def func(block):
       f = open(filename, mode)
       try:
         block(f)
       finally:
         f.close()
     return func

Usage example:

   with_file("foo.txt", "w") as f:
     f.write("My hovercraft is full of parrots.")

Does that help?

-- 
Greg Ewing, Computer Science Dept, +--------------------------------------+
University of Canterbury,	   | A citizen of NewZealandCorp, a	  |
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