[Python-Dev] anonymous blocks

Greg Ewing greg.ewing at canterbury.ac.nz
Fri Apr 22 08:19:45 CEST 2005

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)
     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	  |
Christchurch, New Zealand	   | wholly-owned subsidiary of USA Inc.  |
greg.ewing at canterbury.ac.nz	   +--------------------------------------+

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